From 7af0dd105e2e4839d9f49e8cf0dba51f60d6bb30 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Tue, 18 Jun 2019 14:16:43 +0200
Subject: [PATCH] Use tr:: instead of Lang::Viewer.

---
 .../SourceFiles/boxes/auto_download_box.cpp   |  20 +--
 .../SourceFiles/boxes/change_phone_box.cpp    |   4 +-
 .../SourceFiles/boxes/create_poll_box.cpp     |   4 +-
 .../SourceFiles/boxes/edit_privacy_box.cpp    |   6 +-
 Telegram/SourceFiles/boxes/edit_privacy_box.h |   4 +-
 .../boxes/peers/edit_contact_box.cpp          |   2 +-
 .../boxes/peers/edit_linked_chat_box.cpp      |   7 +-
 .../boxes/peers/edit_participant_box.cpp      |  10 +-
 .../edit_peer_history_visibility_box.cpp      |  18 +--
 .../boxes/peers/edit_peer_info_box.cpp        |  82 ++++++-----
 .../boxes/peers/edit_peer_permissions_box.cpp |  14 +-
 .../boxes/peers/edit_peer_permissions_box.h   |   4 +-
 .../boxes/peers/edit_peer_type_box.cpp        |  69 ++++-----
 .../boxes/peers/edit_peer_type_box.h          |   4 +-
 Telegram/SourceFiles/boxes/sessions_box.cpp   |  18 +--
 .../view/export_view_panel_controller.cpp     |  10 +-
 .../SourceFiles/history/history_widget.cpp    |   5 +-
 Telegram/SourceFiles/info/info_top_bar.cpp    | 138 +++++++++---------
 .../info/profile/info_profile_actions.cpp     |  76 +++++-----
 .../info/profile/info_profile_cover.cpp       |   2 +-
 .../info/profile/info_profile_values.cpp      |  11 +-
 .../info/profile/info_profile_values.h        |   6 -
 Telegram/SourceFiles/lang/lang_instance.cpp   |  11 +-
 Telegram/SourceFiles/lang/lang_instance.h     |   9 +-
 Telegram/SourceFiles/lang/lang_values.h       |  15 +-
 .../SourceFiles/passport/passport_panel.cpp   |   2 +-
 .../passport/passport_panel_controller.cpp    |  10 +-
 .../passport/passport_panel_edit_contact.cpp  |  14 +-
 .../passport/passport_panel_edit_scans.cpp    |  38 ++---
 .../settings/settings_advanced.cpp            |  24 +--
 .../SourceFiles/settings/settings_calls.cpp   |  14 +-
 .../SourceFiles/settings/settings_chat.cpp    |  38 ++---
 .../SourceFiles/settings/settings_common.cpp  |  30 ++--
 .../SourceFiles/settings/settings_common.h    |  15 +-
 .../settings/settings_information.cpp         |  16 +-
 .../SourceFiles/settings/settings_intro.cpp   |   2 +-
 .../SourceFiles/settings/settings_main.cpp    |  22 +--
 .../settings/settings_notifications.cpp       |  12 +-
 .../settings/settings_privacy_controllers.cpp |  96 ++++++------
 .../settings/settings_privacy_controllers.h   |  39 +++--
 .../settings/settings_privacy_security.cpp    |  69 +++++----
 .../settings/settings_privacy_security.h      |   2 +-
 .../window/window_outdated_bar.cpp            |   2 +-
 43 files changed, 483 insertions(+), 511 deletions(-)

diff --git a/Telegram/SourceFiles/boxes/auto_download_box.cpp b/Telegram/SourceFiles/boxes/auto_download_box.cpp
index d042b9679..f9b70c0f3 100644
--- a/Telegram/SourceFiles/boxes/auto_download_box.cpp
+++ b/Telegram/SourceFiles/boxes/auto_download_box.cpp
@@ -63,14 +63,14 @@ void AutoDownloadBox::setupContent() {
 	};
 
 	const auto values = Ui::CreateChild<base::flat_map<Type, int>>(content);
-	const auto add = [&](Type type, LangKey label) {
+	const auto add = [&](Type type, rpl::producer<QString> label) {
 		if (ranges::find(kHidden, type) != end(kHidden)) {
 			return;
 		}
 		const auto value = settings->bytesLimit(_source, type);
 		AddButton(
 			content,
-			label,
+			std::move(label),
 			st::settingsButton
 		)->toggleOn(
 			rpl::single(value > 0)
@@ -80,13 +80,13 @@ void AutoDownloadBox::setupContent() {
 		}, content->lifetime());
 		values->emplace(type, value);
 	};
-	add(Type::Photo, lng_media_photo_title);
-	add(Type::VoiceMessage, lng_media_audio_title);
-	add(Type::VideoMessage, lng_media_video_messages_title);
-	add(Type::Video, lng_media_video_title);
-	add(Type::File, lng_media_file_title);
-	add(Type::Music, lng_media_music_title);
-	add(Type::GIF, lng_media_animation_title);
+	add(Type::Photo, tr::lng_media_photo_title());
+	add(Type::VoiceMessage, tr::lng_media_audio_title());
+	add(Type::VideoMessage, tr::lng_media_video_messages_title());
+	add(Type::Video, tr::lng_media_video_title());
+	add(Type::File, tr::lng_media_file_title());
+	add(Type::Music, tr::lng_media_music_title());
+	add(Type::GIF, tr::lng_media_animation_title());
 
 	const auto limits = Ui::CreateChild<rpl::event_stream<int>>(content);
 	using Pair = base::flat_map<Type, int>::value_type;
@@ -98,7 +98,7 @@ void AutoDownloadBox::setupContent() {
 	const auto limit = Ui::CreateChild<int>(content, initialLimit);
 	AddButtonWithLabel(
 		content,
-		lng_media_size_limit,
+		tr::lng_media_size_limit(),
 		limits->events_starting_with_copy(
 			initialLimit
 		) | rpl::map([](int value) {
diff --git a/Telegram/SourceFiles/boxes/change_phone_box.cpp b/Telegram/SourceFiles/boxes/change_phone_box.cpp
index 6b31780e4..edf34d2d5 100644
--- a/Telegram/SourceFiles/boxes/change_phone_box.cpp
+++ b/Telegram/SourceFiles/boxes/change_phone_box.cpp
@@ -350,9 +350,7 @@ void ChangePhoneBox::prepare() {
 
 	const auto label = Ui::CreateChild<Ui::FlatLabel>(
 		this,
-		Lang::Viewer(
-			lng_change_phone_about
-		) | Ui::Text::ToRichLangValue(),
+		tr::lng_change_phone_about(Ui::Text::RichLangValue),
 		st::changePhoneDescription);
 	label->moveToLeft((st::boxWideWidth - label->width()) / 2, st::changePhoneDescriptionTop);
 
diff --git a/Telegram/SourceFiles/boxes/create_poll_box.cpp b/Telegram/SourceFiles/boxes/create_poll_box.cpp
index 74c4b4941..6045602a6 100644
--- a/Telegram/SourceFiles/boxes/create_poll_box.cpp
+++ b/Telegram/SourceFiles/boxes/create_poll_box.cpp
@@ -597,7 +597,7 @@ not_null<Ui::InputField*> CreatePollBox::setupQuestion(
 		not_null<Ui::VerticalLayout*> container) {
 	using namespace Settings;
 
-	AddSubsectionTitle(container, lng_polls_create_question);
+	AddSubsectionTitle(container, tr::lng_polls_create_question());
 	const auto question = container->add(
 		object_ptr<Ui::InputField>(
 			container,
@@ -645,7 +645,7 @@ object_ptr<Ui::RpWidget> CreatePollBox::setupContent() {
 	const auto question = setupQuestion(container);
 	AddDivider(container);
 	AddSkip(container);
-	AddSubsectionTitle(container, lng_polls_create_options);
+	AddSubsectionTitle(container, tr::lng_polls_create_options());
 	const auto options = lifetime().make_state<Options>(
 		getDelegate()->outerContainer(),
 		container);
diff --git a/Telegram/SourceFiles/boxes/edit_privacy_box.cpp b/Telegram/SourceFiles/boxes/edit_privacy_box.cpp
index 98fda2c80..8af1f0f4c 100644
--- a/Telegram/SourceFiles/boxes/edit_privacy_box.cpp
+++ b/Telegram/SourceFiles/boxes/edit_privacy_box.cpp
@@ -311,13 +311,13 @@ void EditPrivacyBox::setupContent() {
 				content,
 				object_ptr<Button>(
 					content,
-					Lang::Viewer(text),
+					rpl::duplicate(text),
 					st::settingsButton)));
 		CreateRightLabel(
 			button->entity(),
 			std::move(label),
 			st::settingsButton,
-			text);
+			std::move(text));
 		button->toggleOn(rpl::duplicate(
 			optionValue
 		) | rpl::map([=] {
@@ -344,7 +344,7 @@ void EditPrivacyBox::setupContent() {
 
 	AddDivider(content);
 	AddSkip(content);
-	AddSubsectionTitle(content, lng_edit_privacy_exceptions);
+	AddSubsectionTitle(content, tr::lng_edit_privacy_exceptions());
 	const auto always = addExceptionLink(Exception::Always);
 	const auto never = addExceptionLink(Exception::Never);
 	addLabel(content, _controller->exceptionsDescription());
diff --git a/Telegram/SourceFiles/boxes/edit_privacy_box.h b/Telegram/SourceFiles/boxes/edit_privacy_box.h
index 4d44db542..65376b837 100644
--- a/Telegram/SourceFiles/boxes/edit_privacy_box.h
+++ b/Telegram/SourceFiles/boxes/edit_privacy_box.h
@@ -43,12 +43,12 @@ public:
 	[[nodiscard]] virtual bool hasOption(Option option) {
 		return true;
 	}
-	[[nodiscard]] virtual LangKey optionsTitleKey() = 0;
+	[[nodiscard]] virtual rpl::producer<QString> optionsTitleKey() = 0;
 	[[nodiscard]] virtual LangKey optionLabelKey(Option option);
 	[[nodiscard]] virtual rpl::producer<QString> warning() {
 		return rpl::never<QString>();
 	}
-	[[nodiscard]] virtual LangKey exceptionButtonTextKey(
+	[[nodiscard]] virtual rpl::producer<QString> exceptionButtonTextKey(
 		Exception exception) = 0;
 	[[nodiscard]] virtual QString exceptionBoxTitle(
 		Exception exception) = 0;
diff --git a/Telegram/SourceFiles/boxes/peers/edit_contact_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_contact_box.cpp
index b0d799020..ca1d20cea 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_contact_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_contact_box.cpp
@@ -99,7 +99,7 @@ void Controller::setupCover() {
 			_user,
 			_window->sessionController(),
 			(_phone.isEmpty()
-				? Lang::Viewer(lng_contact_mobile_hidden)
+				? tr::lng_contact_mobile_hidden()
 				: rpl::single(App::formatPhone(_phone)))),
 		style::margins())->setAttribute(Qt::WA_TransparentForMouseEvents);
 }
diff --git a/Telegram/SourceFiles/boxes/peers/edit_linked_chat_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_linked_chat_box.cpp
index 2421992e7..ea9b9ce73 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_linked_chat_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_linked_chat_box.cpp
@@ -248,10 +248,9 @@ object_ptr<Ui::RpWidget> SetupUnlink(
 		Fn<void(ChannelData*)> callback) {
 	auto result = object_ptr<Info::Profile::Button>(
 		parent,
-		Lang::Viewer(channel->isBroadcast()
-			? lng_manage_discussion_group_unlink
-			: lng_manage_linked_channel_unlink
-		) | Ui::Text::ToUpper(),
+		(channel->isBroadcast()
+			? tr::lng_manage_discussion_group_unlink
+			: tr::lng_manage_linked_channel_unlink)() | Ui::Text::ToUpper(),
 		st::infoUnlinkChatButton);
 	result->addClickHandler([=] {
 		callback(nullptr);
diff --git a/Telegram/SourceFiles/boxes/peers/edit_participant_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_participant_box.cpp
index 6bc6971ae..aa5a62b4f 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_participant_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_participant_box.cpp
@@ -320,7 +320,7 @@ void EditAdminBox::prepare() {
 		: channel->anyoneCanAddMembers();
 	auto [checkboxes, getChecked, changes] = CreateEditAdminRights(
 		this,
-		lng_rights_edit_admin_header,
+		tr::lng_rights_edit_admin_header(),
 		prepareFlags,
 		disabledMessages,
 		isGroup,
@@ -401,9 +401,9 @@ not_null<Ui::SlideWrap<Ui::RpWidget>*> EditAdminBox::setupTransferButton(
 	addDivider();
 	container->add(EditPeerInfoBox::CreateButton(
 		this,
-		Lang::Viewer(isGroup
-			? lng_rights_transfer_group
-			: lng_rights_transfer_channel),
+		(isGroup
+			? tr::lng_rights_transfer_group
+			: tr::lng_rights_transfer_channel)(),
 		rpl::single(QString()),
 		[=] { transferOwnership(); },
 		st::peerPermissionsButton));
@@ -620,7 +620,7 @@ void EditRestrictedBox::prepare() {
 
 	auto [checkboxes, getRestrictions, changes] = CreateEditRestrictions(
 		this,
-		lng_rights_user_restrictions_header,
+		tr::lng_rights_user_restrictions_header(),
 		prepareFlags,
 		disabledMessages);
 	addControl(std::move(checkboxes), QMargins());
diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_history_visibility_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_peer_history_visibility_box.cpp
index 38d5c33a8..30c517281 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_history_visibility_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_history_visibility_box.cpp
@@ -26,8 +26,8 @@ namespace {
 void AddRadioButton(
 		not_null<Ui::VerticalLayout*> container,
 		HistoryVisibility value,
-		LangKey groupTextKey,
-		LangKey groupAboutKey,
+		const QString &groupText,
+		rpl::producer<QString> groupAbout,
 		std::shared_ptr<Ui::RadioenumGroup<HistoryVisibility>> historyVisibility) {
 	container->add(object_ptr<Ui::FixedHeightWidget>(
 		container,
@@ -36,13 +36,13 @@ void AddRadioButton(
 		container,
 		historyVisibility,
 		value,
-		lang(groupTextKey),
+		groupText,
 		st::defaultBoxCheckbox));
 	container->add(object_ptr<Ui::PaddingWrap<Ui::FlatLabel>>(
 		container,
 		object_ptr<Ui::FlatLabel>(
 			container,
-			Lang::Viewer(groupAboutKey),
+			std::move(groupAbout),
 			st::editPeerPrivacyLabel),
 		st::editPeerPreHistoryLabelMargins));
 }
@@ -80,16 +80,16 @@ void FillContent(
 	AddRadioButton(
 		container,
 		HistoryVisibility::Visible,
-		lng_manage_history_visibility_shown,
-		lng_manage_history_visibility_shown_about,
+		tr::lng_manage_history_visibility_shown(tr::now),
+		tr::lng_manage_history_visibility_shown_about(),
 		historyVisibility);
 	AddRadioButton(
 		container,
 		HistoryVisibility::Hidden,
-		lng_manage_history_visibility_hidden,
+		tr::lng_manage_history_visibility_hidden(tr::now),
 		(peer->isChat()
-			? lng_manage_history_visibility_hidden_legacy
-			: lng_manage_history_visibility_hidden_about),
+			? tr::lng_manage_history_visibility_hidden_legacy
+			: tr::lng_manage_history_visibility_hidden_about)(),
 		historyVisibility);
 }
 
diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp
index 14ce6034b..a4320bc48 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp
@@ -193,7 +193,8 @@ private:
 
 	bool canEditInformation() const;
 	void refreshHistoryVisibility(anim::type animated = anim::type::normal);
-	void showEditPeerTypeBox(std::optional<LangKey> error = std::nullopt);
+	void showEditPeerTypeBox(
+		std::optional<rpl::producer<QString>> error = {});
 	void showEditLinkedChatBox();
 	void fillPrivacyTypeButton();
 	void fillLinkedChatButton();
@@ -449,7 +450,7 @@ object_ptr<Ui::RpWidget> Controller::createStickersEdit() {
 
 	container->add(object_ptr<Ui::FlatLabel>(
 		container,
-		Lang::Viewer(lng_group_stickers),
+		tr::lng_group_stickers(),
 		st::editPeerSectionLabel));
 	container->add(object_ptr<Ui::FixedHeightWidget>(
 		container,
@@ -457,7 +458,7 @@ object_ptr<Ui::RpWidget> Controller::createStickersEdit() {
 
 	container->add(object_ptr<Ui::FlatLabel>(
 		container,
-		Lang::Viewer(lng_group_stickers_description),
+		tr::lng_group_stickers_description(),
 		st::editPeerPrivacyLabel));
 	container->add(object_ptr<Ui::FixedHeightWidget>(
 		container,
@@ -465,7 +466,7 @@ object_ptr<Ui::RpWidget> Controller::createStickersEdit() {
 
 	container->add(object_ptr<Ui::LinkButton>(
 		_wrap,
-		lang(lng_group_stickers_add),
+		tr::lng_group_stickers_add(tr::now),
 		st::editPeerInviteLinkButton)
 	)->addClickHandler([=] {
 		Ui::show(Box<StickersBox>(channel), LayerOption::KeepOther);
@@ -493,7 +494,8 @@ void Controller::refreshHistoryVisibility(anim::type animated) {
 		animated);
 };
 
-void Controller::showEditPeerTypeBox(std::optional<LangKey> error) {
+void Controller::showEditPeerTypeBox(
+		std::optional<rpl::producer<QString>> error) {
 	const auto boxCallback = crl::guard(this, [=](
 			Privacy checked, QString publicLink) {
 		_privacyTypeUpdates.fire(std::move(checked));
@@ -575,19 +577,19 @@ void Controller::fillPrivacyTypeButton() {
 	const auto isGroup = (_peer->isChat() || _peer->isMegagroup());
 	AddButtonWithText(
 		_controls.buttonsLayout,
-		Lang::Viewer(isGroup
-			? lng_manage_peer_group_type
-			: lng_manage_peer_channel_type),
+		(isGroup
+			? tr::lng_manage_peer_group_type
+			: tr::lng_manage_peer_channel_type)(),
 		_privacyTypeUpdates.events(
 		) | rpl::map([=](Privacy flag) {
-			return lang(Privacy::Public == flag
+			return (Privacy::Public == flag
 				? (isGroup
-					? lng_manage_public_group_title
-					: lng_manage_public_peer_title)
+					? tr::lng_manage_public_group_title
+					: tr::lng_manage_public_peer_title)
 				: (isGroup
-					? lng_manage_private_group_title
-					: lng_manage_private_peer_title));
-		}),
+					? tr::lng_manage_private_group_title
+					: tr::lng_manage_private_peer_title))();
+		}) | rpl::flatten_latest(),
 		[=] { showEditPeerTypeBox(); });
 
 	_privacyTypeUpdates.fire_copy(*_privacySavedValue);
@@ -602,10 +604,10 @@ void Controller::fillLinkedChatButton() {
 
 	const auto isGroup = (_peer->isChat() || _peer->isMegagroup());
 	auto text = !isGroup
-		? Lang::Viewer(lng_manage_discussion_group)
+		? tr::lng_manage_discussion_group()
 		: rpl::combine(
-			Lang::Viewer(lng_manage_linked_channel),
-			Lang::Viewer(lng_manage_linked_channel_restore),
+			tr::lng_manage_linked_channel(),
+			tr::lng_manage_linked_channel_restore(),
 			_linkedChatUpdates.events()
 		) | rpl::map([=](
 				const QString &edit,
@@ -619,7 +621,7 @@ void Controller::fillLinkedChatButton() {
 			return chat ? chat->name : QString();
 		}) | rpl::type_erased()
 		: rpl::combine(
-			Lang::Viewer(lng_manage_discussion_group_add),
+			tr::lng_manage_discussion_group_add(),
 			_linkedChatUpdates.events()
 		) | rpl::map([=](const QString &add, ChannelData *chat) {
 			return chat
@@ -645,7 +647,7 @@ void Controller::fillInviteLinkButton() {
 
 	AddButtonWithText(
 		_controls.buttonsLayout,
-		Lang::Viewer(lng_profile_invite_link_section),
+		tr::lng_profile_invite_link_section(),
 		rpl::single(QString()), //Empty text.
 		buttonCallback);
 }
@@ -657,7 +659,7 @@ void Controller::fillSignaturesButton() {
 
 	AddButtonWithText(
 		_controls.buttonsLayout,
-		Lang::Viewer(lng_edit_sign_messages),
+		tr::lng_edit_sign_messages(),
 		rpl::single(QString()),
 		[=] {}
 	)->toggleOn(rpl::single(channel->addsSignature())
@@ -701,13 +703,13 @@ void Controller::fillHistoryVisibilityButton() {
 	};
 	AddButtonWithText(
 		container,
-		Lang::Viewer(lng_manage_history_visibility_title),
+		tr::lng_manage_history_visibility_title(),
 		updateHistoryVisibility->events(
 		) | rpl::map([](HistoryVisibility flag) {
-			return lang((HistoryVisibility::Visible == flag)
-				? lng_manage_history_visibility_shown
-				: lng_manage_history_visibility_hidden);
-		}),
+			return (HistoryVisibility::Visible == flag
+				? tr::lng_manage_history_visibility_shown
+				: tr::lng_manage_history_visibility_hidden)();
+		}) | rpl::flatten_latest(),
 		buttonCallback);
 
 	updateHistoryVisibility->fire_copy(*_historyVisibilitySavedValue);
@@ -824,7 +826,7 @@ void Controller::fillManageSection() {
 	if (canEditPermissions) {
 		AddButtonWithCount(
 			_controls.buttonsLayout,
-			Lang::Viewer(lng_manage_peer_permissions),
+			tr::lng_manage_peer_permissions(),
 			Info::Profile::RestrictionsCountValue(_peer)
 			| ToPositiveNumberStringRestrictions(),
 			[=] { ShowEditPermissions(_peer); },
@@ -833,7 +835,7 @@ void Controller::fillManageSection() {
 	if (canViewAdmins) {
 		AddButtonWithCount(
 			_controls.buttonsLayout,
-			Lang::Viewer(lng_manage_peer_administrators),
+			tr::lng_manage_peer_administrators(),
 			Info::Profile::AdminsCountValue(_peer)
 			| ToPositiveNumberString(),
 			[=] {
@@ -847,7 +849,7 @@ void Controller::fillManageSection() {
 	if (canViewMembers) {
 		AddButtonWithCount(
 			_controls.buttonsLayout,
-			Lang::Viewer(lng_manage_peer_members),
+			tr::lng_manage_peer_members(),
 			Info::Profile::MembersCountValue(_peer)
 			| ToPositiveNumberString(),
 			[=] {
@@ -861,7 +863,7 @@ void Controller::fillManageSection() {
 	if (canViewKicked) {
 		AddButtonWithCount(
 			_controls.buttonsLayout,
-			Lang::Viewer(lng_manage_peer_removed_users),
+			tr::lng_manage_peer_removed_users(),
 			Info::Profile::KickedCountValue(channel)
 			| ToPositiveNumberString(),
 			[=] {
@@ -875,7 +877,7 @@ void Controller::fillManageSection() {
 	if (hasRecentActions) {
 		AddButtonWithCount(
 			_controls.buttonsLayout,
-			Lang::Viewer(lng_manage_peer_recent_actions),
+			tr::lng_manage_peer_recent_actions(),
 			rpl::single(QString()), //Empty count.
 			[=] {
 				navigation->showSection(AdminLog::SectionMemento(channel));
@@ -895,9 +897,9 @@ void Controller::fillManageSection() {
 	if (canDeleteChannel) {
 		AddButtonDelete(
 			_controls.buttonsLayout,
-			Lang::Viewer(_isGroup
-				? lng_profile_delete_group
-				: lng_profile_delete_channel),
+			(_isGroup
+				? tr::lng_profile_delete_group
+				: tr::lng_profile_delete_channel)(),
 			[=]{ deleteWithConfirmation(); }
 		);
 	}
@@ -1079,17 +1081,17 @@ void Controller::saveUsername() {
 			continueSave();
 			return;
 		}
-		const auto errorKey = [&] {
+
+		// Very rare case.
+		showEditPeerTypeBox([&] {
 			if (type == qstr("USERNAME_INVALID")) {
-				return lng_create_channel_link_invalid;
+				return tr::lng_create_channel_link_invalid();
 			} else if (type == qstr("USERNAME_OCCUPIED")
 				|| type == qstr("USERNAMES_UNAVAILABLE")) {
-				return lng_create_channel_link_occupied;
+				return tr::lng_create_channel_link_occupied();
 			}
-			return lng_create_channel_link_invalid;
-		}();
-		// Very rare case.
-		showEditPeerTypeBox(errorKey);
+			return tr::lng_create_channel_link_invalid();
+		}());
 		cancelSave();
 	}).send();
 }
diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.cpp
index d58ac1a23..641b66746 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.cpp
@@ -336,7 +336,7 @@ void EditPeerPermissionsBox::prepare() {
 
 	auto [checkboxes, getRestrictions, changes] = CreateEditRestrictions(
 		this,
-		lng_rights_default_restrictions_header,
+		tr::lng_rights_default_restrictions_header(),
 		restrictions,
 		disabledMessages);
 
@@ -367,7 +367,7 @@ void EditPeerPermissionsBox::addBannedButtons(
 	const auto navigation = App::wnd()->sessionController();
 	container->add(EditPeerInfoBox::CreateButton(
 		container,
-		Lang::Viewer(lng_manage_peer_exceptions),
+		tr::lng_manage_peer_exceptions(),
 		(channel
 			? Info::Profile::RestrictedCountValue(channel)
 			: rpl::single(0)) | ToPositiveNumberString(),
@@ -381,7 +381,7 @@ void EditPeerPermissionsBox::addBannedButtons(
 	if (channel) {
 		container->add(EditPeerInfoBox::CreateButton(
 			container,
-			Lang::Viewer(lng_manage_peer_removed_users),
+			tr::lng_manage_peer_removed_users(),
 			Info::Profile::KickedCountValue(channel)
 			| ToPositiveNumberString(),
 			[=] {
@@ -400,7 +400,7 @@ template <
 	typename FlagLabelPairs>
 EditFlagsControl<Flags> CreateEditFlags(
 		QWidget *parent,
-		LangKey header,
+		rpl::producer<QString> header,
 		Flags checked,
 		const DisabledMessagePairs &disabledMessagePairs,
 		const FlagLabelPairs &flagLabelPairs) {
@@ -433,7 +433,7 @@ EditFlagsControl<Flags> CreateEditFlags(
 	container->add(
 		object_ptr<Ui::FlatLabel>(
 			container,
-			Lang::Viewer(header),
+			std::move(header),
 			st::rightsHeaderLabel),
 		st::rightsHeaderMargin);
 
@@ -490,7 +490,7 @@ EditFlagsControl<Flags> CreateEditFlags(
 
 EditFlagsControl<MTPDchatBannedRights::Flags> CreateEditRestrictions(
 		QWidget *parent,
-		LangKey header,
+		rpl::producer<QString> header,
 		MTPDchatBannedRights::Flags restrictions,
 		std::map<MTPDchatBannedRights::Flags, QString> disabledMessages) {
 	auto result = CreateEditFlags(
@@ -511,7 +511,7 @@ EditFlagsControl<MTPDchatBannedRights::Flags> CreateEditRestrictions(
 
 EditFlagsControl<MTPDchatAdminRights::Flags> CreateEditAdminRights(
 		QWidget *parent,
-		LangKey header,
+	rpl::producer<QString> header,
 		MTPDchatAdminRights::Flags rights,
 		std::map<MTPDchatAdminRights::Flags, QString> disabledMessages,
 		bool isGroup,
diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.h b/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.h
index 5095f3264..4bd9dad02 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.h
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.h
@@ -44,13 +44,13 @@ struct EditFlagsControl {
 
 EditFlagsControl<MTPDchatBannedRights::Flags> CreateEditRestrictions(
 	QWidget *parent,
-	LangKey header,
+	rpl::producer<QString> header,
 	MTPDchatBannedRights::Flags restrictions,
 	std::map<MTPDchatBannedRights::Flags, QString> disabledMessages);
 
 EditFlagsControl<MTPDchatAdminRights::Flags> CreateEditAdminRights(
 	QWidget *parent,
-	LangKey header,
+	rpl::producer<QString> header,
 	MTPDchatAdminRights::Flags rights,
 	std::map<MTPDchatAdminRights::Flags, QString> disabledMessages,
 	bool isGroup,
diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.cpp
index f6929ded1..40c92e7cd 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.cpp
@@ -78,9 +78,9 @@ public:
 		return _controls.privacy->value();
 	}
 
-	void showError(LangKey key) {
+	void showError(rpl::producer<QString> text) {
 		_controls.usernameInput->showError();
-		showUsernameError(Lang::Viewer(key));
+		showUsernameError(std::move(text));
 	}
 
 private:
@@ -129,10 +129,10 @@ private:
 	void addRoundButton(
 		not_null<Ui::VerticalLayout*> container,
 		Privacy value,
-		LangKey groupTextKey,
-		LangKey channelTextKey,
-		LangKey groupAboutKey,
-		LangKey channelAboutKey);
+		const QString &groupText,
+		const QString &channelText,
+		rpl::producer<QString> groupAbout,
+		rpl::producer<QString> channelAbout);
 
 	bool inviteLinkShown();
 	QString inviteLinkText();
@@ -197,21 +197,21 @@ void Controller::createContent() {
 void Controller::addRoundButton(
 		not_null<Ui::VerticalLayout*> container,
 		Privacy value,
-		LangKey groupTextKey,
-		LangKey channelTextKey,
-		LangKey groupAboutKey,
-		LangKey channelAboutKey) {
+		const QString &groupText,
+		const QString &channelText,
+		rpl::producer<QString> groupAbout,
+		rpl::producer<QString> channelAbout) {
 	container->add(object_ptr<Ui::Radioenum<Privacy>>(
 		container,
 		_controls.privacy,
 		value,
-		lang(_isGroup ? groupTextKey : channelTextKey),
+		(_isGroup ? groupText : channelText),
 		st::editPeerPrivacyBoxCheckbox));
 	container->add(object_ptr<Ui::PaddingWrap<Ui::FlatLabel>>(
 		container,
 		object_ptr<Ui::FlatLabel>(
 			container,
-			Lang::Viewer(_isGroup ? groupAboutKey : channelAboutKey),
+			std::move(_isGroup ? groupAbout : channelAbout),
 			st::editPeerPrivacyLabel),
 		st::editPeerPrivacyLabelMargins));
 	container->add(object_ptr<Ui::FixedHeightWidget>(
@@ -249,17 +249,17 @@ void Controller::fillPrivaciesButtons(
 	addRoundButton(
 		container,
 		Privacy::Public,
-		lng_create_public_group_title,
-		lng_create_public_channel_title,
-		lng_create_public_group_about,
-		lng_create_public_channel_about);
+		tr::lng_create_public_group_title(tr::now),
+		tr::lng_create_public_channel_title(tr::now),
+		tr::lng_create_public_group_about(),
+		tr::lng_create_public_channel_about());
 	addRoundButton(
 		container,
 		Privacy::Private,
-		lng_create_private_group_title,
-		lng_create_private_channel_title,
-		lng_create_private_group_about,
-		lng_create_private_channel_about);
+		tr::lng_create_private_group_title(tr::now),
+		tr::lng_create_private_channel_title(tr::now),
+		tr::lng_create_private_group_about(),
+		tr::lng_create_private_channel_about());
 
 	_controls.privacy->setChangedCallback([=](Privacy value) {
 		privacyChanged(value);
@@ -303,7 +303,7 @@ object_ptr<Ui::RpWidget> Controller::createUsernameEdit() {
 		container,
 		object_ptr<Ui::FlatLabel>(
 			container,
-			Lang::Viewer(lng_create_group_link),
+			tr::lng_create_group_link(),
 			st::editPeerSectionLabel),
 		st::editPeerUsernameTitleLabelMargins));
 
@@ -334,7 +334,7 @@ object_ptr<Ui::RpWidget> Controller::createUsernameEdit() {
 		container,
 		object_ptr<Ui::FlatLabel>(
 			container,
-			Lang::Viewer(lng_create_channel_link_about),
+			tr::lng_create_channel_link_about(),
 			st::editPeerPrivacyLabel),
 		st::editPeerUsernameAboutLabelMargins));
 
@@ -415,8 +415,7 @@ void Controller::checkUsernameAvailability() {
 			return;
 		}
 		if (!mtpIsTrue(result) && checking != username) {
-			showUsernameError(
-				Lang::Viewer(lng_create_channel_link_occupied));
+			showUsernameError(tr::lng_create_channel_link_occupied());
 		} else {
 			showUsernameGood();
 		}
@@ -438,12 +437,10 @@ void Controller::checkUsernameAvailability() {
 				setFocusUsername();
 			}
 		} else if (type == qstr("USERNAME_INVALID")) {
-			showUsernameError(
-				Lang::Viewer(lng_create_channel_link_invalid));
+			showUsernameError(tr::lng_create_channel_link_invalid());
 		} else if (type == qstr("USERNAME_OCCUPIED")
 			&& checking != username) {
-			showUsernameError(
-				Lang::Viewer(lng_create_channel_link_occupied));
+			showUsernameError(tr::lng_create_channel_link_occupied());
 		}
 	}).send();
 }
@@ -475,11 +472,9 @@ void Controller::usernameChanged() {
 			&& (ch != '_');
 	}) != username.end();
 	if (bad) {
-		showUsernameError(
-			Lang::Viewer(lng_create_channel_link_bad_symbols));
+		showUsernameError(tr::lng_create_channel_link_bad_symbols());
 	} else if (username.size() < kMinUsernameLength) {
-		showUsernameError(
-			Lang::Viewer(lng_create_channel_link_too_short));
+		showUsernameError(tr::lng_create_channel_link_too_short());
 	} else {
 		_controls.usernameResult = nullptr;
 		_checkUsernameTimer.callOnce(kUsernameCheckTimeout);
@@ -494,7 +489,7 @@ void Controller::showUsernameError(rpl::producer<QString> &&error) {
 void Controller::showUsernameGood() {
 	_isAllowSave = true;
 	showUsernameResult(
-		Lang::Viewer(lng_create_channel_link_available),
+		tr::lng_create_channel_link_available(),
 		&st::editPeerUsernameGood);
 }
 
@@ -585,7 +580,7 @@ object_ptr<Ui::RpWidget> Controller::createInviteLinkEdit() {
 	if (!_isInviteLink) {
 		container->add(object_ptr<Ui::FlatLabel>(
 			container,
-			Lang::Viewer(lng_profile_invite_link_section),
+			tr::lng_profile_invite_link_section(),
 			st::editPeerSectionLabel));
 		container->add(object_ptr<Ui::FixedHeightWidget>(
 			container,
@@ -659,7 +654,7 @@ object_ptr<Ui::RpWidget> Controller::createInviteLinkCreate() {
 	if (!_isInviteLink) {
 		container->add(object_ptr<Ui::FlatLabel>(
 			container,
-			Lang::Viewer(lng_profile_invite_link_section),
+			tr::lng_profile_invite_link_section(),
 			st::editPeerSectionLabel));
 		container->add(object_ptr<Ui::FixedHeightWidget>(
 			container,
@@ -700,7 +695,7 @@ EditPeerTypeBox::EditPeerTypeBox(
 	std::optional<FnMut<void(Privacy, QString)>> savedCallback,
 	std::optional<Privacy> privacySaved,
 	std::optional<QString> usernameSaved,
-	std::optional<LangKey> usernameError)
+	std::optional<rpl::producer<QString>> usernameError)
 : _peer(peer)
 , _savedCallback(std::move(savedCallback))
 , _privacySavedValue(privacySaved)
@@ -728,7 +723,7 @@ void EditPeerTypeBox::prepare() {
 		[=] {
 			controller->setFocusUsername();
 			if (_usernameError.has_value()) {
-				controller->showError(*_usernameError);
+				controller->showError(std::move(*_usernameError));
 				_usernameError = std::nullopt;
 			}
 		},
diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.h b/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.h
index 42922da3a..adcb70b3c 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.h
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.h
@@ -45,7 +45,7 @@ public:
 		std::optional<FnMut<void(Privacy, QString)>> savedCallback = {},
 		std::optional<Privacy> privacySaved = {},
 		std::optional<QString> usernameSaved = {},
-		std::optional<LangKey> usernameError = {});
+		std::optional<rpl::producer<QString>> usernameError = {});
 
 protected:
 	void prepare() override;
@@ -57,7 +57,7 @@ private:
 
 	std::optional<Privacy> _privacySavedValue;
 	std::optional<QString> _usernameSavedValue;
-	std::optional<LangKey> _usernameError;
+	std::optional<rpl::producer<QString>> _usernameError;
 
 	rpl::event_stream<> _focusRequests;
 
diff --git a/Telegram/SourceFiles/boxes/sessions_box.cpp b/Telegram/SourceFiles/boxes/sessions_box.cpp
index fa403b951..00726925d 100644
--- a/Telegram/SourceFiles/boxes/sessions_box.cpp
+++ b/Telegram/SourceFiles/boxes/sessions_box.cpp
@@ -359,7 +359,7 @@ void SessionsBox::Inner::setupContent() {
 
 	const auto content = Ui::CreateChild<Ui::VerticalLayout>(this);
 
-	AddSubsectionTitle(content, lng_sessions_header);
+	AddSubsectionTitle(content, tr::lng_sessions_header());
 	_current = content->add(object_ptr<List>(content));
 	const auto terminateWrap = content->add(
 		object_ptr<Ui::SlideWrap<Ui::VerticalLayout>>(
@@ -369,12 +369,10 @@ void SessionsBox::Inner::setupContent() {
 	_terminateAll = terminateInner->add(
 		object_ptr<Info::Profile::Button>(
 			terminateInner,
-			Lang::Viewer(lng_sessions_terminate_all),
+			tr::lng_sessions_terminate_all(),
 			st::terminateSessionsButton));
 	AddSkip(terminateInner);
-	AddDividerText(
-		terminateInner,
-		Lang::Viewer(lng_sessions_terminate_all_about));
+	AddDividerText(terminateInner, tr::lng_sessions_terminate_all_about());
 
 	const auto incompleteWrap = content->add(
 		object_ptr<Ui::SlideWrap<Ui::VerticalLayout>>(
@@ -382,12 +380,10 @@ void SessionsBox::Inner::setupContent() {
 			object_ptr<Ui::VerticalLayout>(content)))->setDuration(0);
 	const auto incompleteInner = incompleteWrap->entity();
 	AddSkip(incompleteInner);
-	AddSubsectionTitle(incompleteInner, lng_sessions_incomplete);
+	AddSubsectionTitle(incompleteInner, tr::lng_sessions_incomplete());
 	_incomplete = incompleteInner->add(object_ptr<List>(incompleteInner));
 	AddSkip(incompleteInner);
-	AddDividerText(
-		incompleteInner,
-		Lang::Viewer(lng_sessions_incomplete_about));
+	AddDividerText(incompleteInner, tr::lng_sessions_incomplete_about());
 
 	const auto listWrap = content->add(
 		object_ptr<Ui::SlideWrap<Ui::VerticalLayout>>(
@@ -395,7 +391,7 @@ void SessionsBox::Inner::setupContent() {
 			object_ptr<Ui::VerticalLayout>(content)))->setDuration(0);
 	const auto listInner = listWrap->entity();
 	AddSkip(listInner);
-	AddSubsectionTitle(listInner, lng_sessions_other_header);
+	AddSubsectionTitle(listInner, tr::lng_sessions_other_header());
 	_list = listInner->add(object_ptr<List>(listInner));
 	AddSkip(listInner);
 
@@ -404,7 +400,7 @@ void SessionsBox::Inner::setupContent() {
 			content,
 			object_ptr<Ui::FlatLabel>(
 				content,
-				Lang::Viewer(lng_sessions_other_desc),
+				tr::lng_sessions_other_desc(),
 				st::boxDividerLabel),
 			st::settingsDividerLabelPadding))->setDuration(0);
 
diff --git a/Telegram/SourceFiles/export/view/export_view_panel_controller.cpp b/Telegram/SourceFiles/export/view/export_view_panel_controller.cpp
index 8b3f66fb3..00850eca9 100644
--- a/Telegram/SourceFiles/export/view/export_view_panel_controller.cpp
+++ b/Telegram/SourceFiles/export/view/export_view_panel_controller.cpp
@@ -142,9 +142,9 @@ void PanelController::activatePanel() {
 void PanelController::createPanel() {
 	const auto singlePeer = _settings->onlySinglePeer();
 	_panel = base::make_unique_q<Ui::SeparatePanel>();
-	_panel->setTitle(Lang::Viewer(singlePeer
-		? lng_export_header_chats
-		: lng_export_title));
+	_panel->setTitle((singlePeer
+		? tr::lng_export_header_chats
+		: tr::lng_export_title)());
 	_panel->setInnerSize(st::exportPanelSize);
 	_panel->closeRequests(
 	) | rpl::start_with_next([=] {
@@ -268,7 +268,7 @@ void PanelController::showProgress() {
 	_settings->availableAt = 0;
 	ClearSuggestStart();
 
-	_panel->setTitle(Lang::Viewer(lng_export_progress_title));
+	_panel->setTitle(tr::lng_export_progress_title());
 
 	auto progress = base::make_unique_q<ProgressWidget>(
 		_panel.get(),
@@ -365,7 +365,7 @@ void PanelController::updateState(State &&state) {
 	} else if (const auto error = base::get_if<OutputErrorState>(&_state)) {
 		showError(*error);
 	} else if (_state.is<FinishedState>()) {
-		_panel->setTitle(Lang::Viewer(lng_export_title));
+		_panel->setTitle(tr::lng_export_title());
 		_panel->setHideOnDeactivate(false);
 	} else if (_state.is<CancelledState>()) {
 		LOG(("Export Info: Stop Panel After Cancel."));
diff --git a/Telegram/SourceFiles/history/history_widget.cpp b/Telegram/SourceFiles/history/history_widget.cpp
index a25c7abb5..3bc2e9017 100644
--- a/Telegram/SourceFiles/history/history_widget.cpp
+++ b/Telegram/SourceFiles/history/history_widget.cpp
@@ -154,12 +154,9 @@ object_ptr<Ui::FlatButton> SetupDiscussButton(
 		QString(),
 		st::historyComposeButton);
 	const auto button = result.data();
-	auto text = Lang::Viewer(
-		lng_channel_discuss
-	) | Ui::Text::ToUpper();
 	const auto label = Ui::CreateChild<Ui::FlatLabel>(
 		button,
-		rpl::duplicate(text),
+		tr::lng_channel_discuss() | Ui::Text::ToUpper(),
 		st::historyComposeButtonLabel);
 	const auto badge = Ui::CreateChild<Ui::UnreadBadge>(button);
 	label->show();
diff --git a/Telegram/SourceFiles/info/info_top_bar.cpp b/Telegram/SourceFiles/info/info_top_bar.cpp
index 7e72ce9c7..a7477ada3 100644
--- a/Telegram/SourceFiles/info/info_top_bar.cpp
+++ b/Telegram/SourceFiles/info/info_top_bar.cpp
@@ -551,78 +551,76 @@ rpl::producer<QString> TitleValue(
 		const Section &section,
 		Key key,
 		bool isStackBottom) {
-	return Lang::Viewer([&] {
-		const auto peer = key.peer();
+	const auto peer = key.peer();
 
-		switch (section.type()) {
-		case Section::Type::Profile:
-			/*if (const auto feed = key.feed()) {
-				return lng_info_feed_title;
-			} else */if (const auto user = peer->asUser()) {
-				return (user->isBot() && !user->isSupport())
-					? lng_info_bot_title
-					: lng_info_user_title;
-			} else if (const auto channel = peer->asChannel()) {
-				return channel->isMegagroup()
-					? lng_info_group_title
-					: lng_info_channel_title;
-			} else if (peer->isChat()) {
-				return lng_info_group_title;
-			}
-			Unexpected("Bad peer type in Info::TitleValue()");
-
-		case Section::Type::Media:
-			if (peer->isSelf() && isStackBottom) {
-				return lng_profile_shared_media;
-			}
-			switch (section.mediaType()) {
-			case Section::MediaType::Photo:
-				return lng_media_type_photos;
-			case Section::MediaType::Video:
-				return lng_media_type_videos;
-			case Section::MediaType::MusicFile:
-				return lng_media_type_songs;
-			case Section::MediaType::File:
-				return lng_media_type_files;
-			case Section::MediaType::RoundVoiceFile:
-				return lng_media_type_audios;
-			case Section::MediaType::Link:
-				return lng_media_type_links;
-			case Section::MediaType::RoundFile:
-				return lng_media_type_rounds;
-			}
-			Unexpected("Bad media type in Info::TitleValue()");
-
-		case Section::Type::CommonGroups:
-			return lng_profile_common_groups_section;
-
-		case Section::Type::Members:
-			return lng_profile_participants_section;
-
-		//case Section::Type::Channels: // #feed
-		//	return lng_info_feed_channels;
-
-		case Section::Type::Settings:
-			switch (section.settingsType()) {
-			case Section::SettingsType::Main:
-				return lng_menu_settings;
-			case Section::SettingsType::Information:
-				return lng_settings_section_info;
-			case Section::SettingsType::Notifications:
-				return lng_settings_section_notify;
-			case Section::SettingsType::PrivacySecurity:
-				return lng_settings_section_privacy;
-			case Section::SettingsType::Advanced:
-				return lng_settings_advanced;
-			case Section::SettingsType::Chat:
-				return lng_settings_section_chat_settings;
-			case Section::SettingsType::Calls:
-				return lng_settings_section_call_settings;
-			}
-			Unexpected("Bad settings type in Info::TitleValue()");
+	switch (section.type()) {
+	case Section::Type::Profile:
+		/*if (const auto feed = key.feed()) {
+			return tr::lng_info_feed_title();
+		} else */if (const auto user = peer->asUser()) {
+			return (user->isBot() && !user->isSupport())
+				? tr::lng_info_bot_title()
+				: tr::lng_info_user_title();
+		} else if (const auto channel = peer->asChannel()) {
+			return channel->isMegagroup()
+				? tr::lng_info_group_title()
+				: tr::lng_info_channel_title();
+		} else if (peer->isChat()) {
+			return tr::lng_info_group_title();
 		}
-		Unexpected("Bad section type in Info::TitleValue()");
-	}());
+		Unexpected("Bad peer type in Info::TitleValue()");
+
+	case Section::Type::Media:
+		if (peer->isSelf() && isStackBottom) {
+			return tr::lng_profile_shared_media();
+		}
+		switch (section.mediaType()) {
+		case Section::MediaType::Photo:
+			return tr::lng_media_type_photos();
+		case Section::MediaType::Video:
+			return tr::lng_media_type_videos();
+		case Section::MediaType::MusicFile:
+			return tr::lng_media_type_songs();
+		case Section::MediaType::File:
+			return tr::lng_media_type_files();
+		case Section::MediaType::RoundVoiceFile:
+			return tr::lng_media_type_audios();
+		case Section::MediaType::Link:
+			return tr::lng_media_type_links();
+		case Section::MediaType::RoundFile:
+			return tr::lng_media_type_rounds();
+		}
+		Unexpected("Bad media type in Info::TitleValue()");
+
+	case Section::Type::CommonGroups:
+		return tr::lng_profile_common_groups_section();
+
+	case Section::Type::Members:
+		return tr::lng_profile_participants_section();
+
+	//case Section::Type::Channels: // #feed
+	//	return tr::lng_info_feed_channels();
+
+	case Section::Type::Settings:
+		switch (section.settingsType()) {
+		case Section::SettingsType::Main:
+			return tr::lng_menu_settings();
+		case Section::SettingsType::Information:
+			return tr::lng_settings_section_info();
+		case Section::SettingsType::Notifications:
+			return tr::lng_settings_section_notify();
+		case Section::SettingsType::PrivacySecurity:
+			return tr::lng_settings_section_privacy();
+		case Section::SettingsType::Advanced:
+			return tr::lng_settings_advanced();
+		case Section::SettingsType::Chat:
+			return tr::lng_settings_section_chat_settings();
+		case Section::SettingsType::Calls:
+			return tr::lng_settings_section_call_settings();
+		}
+		Unexpected("Bad settings type in Info::TitleValue()");
+	}
+	Unexpected("Bad section type in Info::TitleValue()");
 }
 
 } // namespace Info
diff --git a/Telegram/SourceFiles/info/profile/info_profile_actions.cpp b/Telegram/SourceFiles/info/profile/info_profile_actions.cpp
index 05c52ce44..5cacb0188 100644
--- a/Telegram/SourceFiles/info/profile/info_profile_actions.cpp
+++ b/Telegram/SourceFiles/info/profile/info_profile_actions.cpp
@@ -216,12 +216,12 @@ object_ptr<Ui::RpWidget> DetailsFiller::setupInfo() {
 	auto result = object_ptr<Ui::VerticalLayout>(_wrap);
 	auto tracker = Ui::MultiSlideTracker();
 	auto addInfoLineGeneric = [&](
-			rpl::producer<QString> label,
+			rpl::producer<QString> &&label,
 			rpl::producer<TextWithEntities> &&text,
 			const style::FlatLabel &textSt = st::infoLabeled) {
 		auto line = CreateTextWithLabel(
 			result,
-			std::move(label) | WithEmptyEntities(),
+			std::move(label) | Ui::Text::ToWithEntities(),
 			std::move(text),
 			textSt,
 			st::infoProfileLabeledPadding);
@@ -229,20 +229,20 @@ object_ptr<Ui::RpWidget> DetailsFiller::setupInfo() {
 		return line.text;
 	};
 	auto addInfoLine = [&](
-			LangKey label,
+			rpl::producer<QString> &&label,
 			rpl::producer<TextWithEntities> &&text,
 			const style::FlatLabel &textSt = st::infoLabeled) {
 		return addInfoLineGeneric(
-			Lang::Viewer(label),
+			std::move(label),
 			std::move(text),
 			textSt);
 	};
 	auto addInfoOneLine = [&](
-			LangKey label,
+			rpl::producer<QString> &&label,
 			rpl::producer<TextWithEntities> &&text,
 			const QString &contextCopyText) {
 		auto result = addInfoLine(
-			label,
+			std::move(label),
 			std::move(text),
 			st::infoLabeledOneLine);
 		result->setDoubleClickSelectsParagraph(true);
@@ -257,16 +257,16 @@ object_ptr<Ui::RpWidget> DetailsFiller::setupInfo() {
 		}
 
 		addInfoOneLine(
-			lng_info_mobile_label,
+			tr::lng_info_mobile_label(),
 			PhoneValue(user),
 			lang(lng_profile_copy_phone));
 		if (user->botInfo) {
-			addInfoLine(lng_info_about_label, AboutValue(user));
+			addInfoLine(tr::lng_info_about_label(), AboutValue(user));
 		} else {
-			addInfoLine(lng_info_bio_label, BioValue(user));
+			addInfoLine(tr::lng_info_bio_label(), BioValue(user));
 		}
 		addInfoOneLine(
-			lng_info_username_label,
+			tr::lng_info_username_label(),
 			UsernameValue(user),
 			lang(lng_context_copy_mention));
 	} else {
@@ -288,7 +288,7 @@ object_ptr<Ui::RpWidget> DetailsFiller::setupInfo() {
 			return result;
 		});
 		auto link = addInfoOneLine(
-			lng_info_link_label,
+			tr::lng_info_link_label(),
 			std::move(linkText),
 			QString());
 		link->setClickHandlerFilter([peer = _peer](auto&&...) {
@@ -300,7 +300,7 @@ object_ptr<Ui::RpWidget> DetailsFiller::setupInfo() {
 			}
 			return false;
 		});
-		addInfoLine(lng_info_about_label, AboutValue(_peer));
+		addInfoLine(tr::lng_info_about_label(), AboutValue(_peer));
 	}
 	if (!_peer->isSelf()) {
 		// No notifications toggle for Self => no separator.
@@ -325,7 +325,7 @@ object_ptr<Ui::RpWidget> DetailsFiller::setupMuteToggle() {
 	const auto peer = _peer;
 	auto result = object_ptr<Button>(
 		_wrap,
-		Lang::Viewer(lng_profile_enable_notifications),
+		tr::lng_profile_enable_notifications(),
 		st::infoNotificationsButton);
 	result->toggleOn(
 		NotificationsEnabledValue(peer)
@@ -384,7 +384,7 @@ Ui::MultiSlideTracker DetailsFiller::fillUserButtons(
 		};
 		AddMainButton(
 			_wrap,
-			Lang::Viewer(lng_profile_send_message),
+			tr::lng_profile_send_message(),
 			std::move(sendMessageVisible),
 			std::move(sendMessage),
 			tracker);
@@ -410,7 +410,7 @@ Ui::MultiSlideTracker DetailsFiller::fillUserButtons(
 		const auto window = &_controller->parentController()->window()->controller();
 		AddMainButton(
 			_wrap,
-			Lang::Viewer(lng_info_add_as_contact),
+			tr::lng_info_add_as_contact(),
 			CanAddContactValue(user),
 			[=] { window->show(Box(EditContactBox, window, user)); },
 			tracker);
@@ -439,7 +439,7 @@ Ui::MultiSlideTracker DetailsFiller::fillChannelButtons(
 	};
 	AddMainButton(
 		_wrap,
-		Lang::Viewer(lng_profile_view_channel),
+		tr::lng_profile_view_channel(),
 		std::move(viewChannelVisible),
 		std::move(viewChannel),
 		tracker);
@@ -472,7 +472,7 @@ void ActionsFiller::addInviteToGroupAction(
 		not_null<UserData*> user) {
 	AddActionButton(
 		_wrap,
-		Lang::Viewer(lng_profile_invite_to_group),
+		tr::lng_profile_invite_to_group(),
 		CanInviteBotToGroupValue(user),
 		[user] { AddBotToGroupBoxController::Start(user); });
 }
@@ -480,7 +480,7 @@ void ActionsFiller::addInviteToGroupAction(
 void ActionsFiller::addShareContactAction(not_null<UserData*> user) {
 	AddActionButton(
 		_wrap,
-		Lang::Viewer(lng_info_share_contact),
+		tr::lng_info_share_contact(),
 		CanShareContactValue(user),
 		[user] { Window::PeerMenuShareContactBox(user); });
 }
@@ -489,7 +489,7 @@ void ActionsFiller::addEditContactAction(not_null<UserData*> user) {
 	const auto window = &_controller->parentController()->window()->controller();
 	AddActionButton(
 		_wrap,
-		Lang::Viewer(lng_info_edit_contact),
+		tr::lng_info_edit_contact(),
 		IsContactValue(user),
 		[=] { window->show(Box(EditContactBox, window, user)); });
 }
@@ -498,7 +498,7 @@ void ActionsFiller::addDeleteContactAction(
 		not_null<UserData*> user) {
 	AddActionButton(
 		_wrap,
-		Lang::Viewer(lng_info_delete_contact),
+		tr::lng_info_delete_contact(),
 		IsContactValue(user),
 		[user] { Window::PeerMenuDeleteContact(user); });
 }
@@ -506,7 +506,7 @@ void ActionsFiller::addDeleteContactAction(
 void ActionsFiller::addClearHistoryAction(not_null<UserData*> user) {
 	AddActionButton(
 		_wrap,
-		Lang::Viewer(lng_profile_clear_history),
+		tr::lng_profile_clear_history(),
 		rpl::single(true),
 		 Window::ClearHistoryHandler(user));
 }
@@ -515,7 +515,7 @@ void ActionsFiller::addDeleteConversationAction(
 		not_null<UserData*> user) {
 	AddActionButton(
 		_wrap,
-		Lang::Viewer(lng_profile_delete_conversation),
+		tr::lng_profile_delete_conversation(),
 		rpl::single(true),
 		Window::DeleteAndLeaveHandler(user));
 }
@@ -550,23 +550,25 @@ void ActionsFiller::addBotCommandActions(not_null<UserData*> user) {
 			App::sendBotCommand(user, user, '/' + original);
 		}
 	};
-	auto addBotCommand = [=](LangKey key, const QString &command) {
+	auto addBotCommand = [=](
+			rpl::producer<QString> text,
+			const QString &command) {
 		AddActionButton(
 			_wrap,
-			Lang::Viewer(key),
+			std::move(text),
 			hasBotCommandValue(command),
 			[=] { sendBotCommand(command); });
 	};
-	addBotCommand(lng_profile_bot_help, qsl("help"));
-	addBotCommand(lng_profile_bot_settings, qsl("settings"));
-	addBotCommand(lng_profile_bot_privacy, qsl("privacy"));
+	addBotCommand(tr::lng_profile_bot_help(), qsl("help"));
+	addBotCommand(tr::lng_profile_bot_settings(), qsl("settings"));
+	addBotCommand(tr::lng_profile_bot_privacy(), qsl("privacy"));
 }
 
 void ActionsFiller::addReportAction() {
 	const auto peer = _peer;
 	AddActionButton(
 		_wrap,
-		Lang::Viewer(lng_profile_report),
+		tr::lng_profile_report(),
 		rpl::single(true),
 		[=] { Ui::show(Box<ReportBox>(peer)); },
 		st::infoBlockButton);
@@ -581,14 +583,14 @@ void ActionsFiller::addBlockAction(not_null<UserData*> user) {
 	) | rpl::map([user] {
 		switch (user->blockStatus()) {
 		case UserData::BlockStatus::Blocked:
-			return Lang::Viewer((user->isBot() && !user->isSupport())
-				? lng_profile_restart_bot
-				: lng_profile_unblock_user);
+			return ((user->isBot() && !user->isSupport())
+				? tr::lng_profile_restart_bot
+				: tr::lng_profile_unblock_user)();
 		case UserData::BlockStatus::NotBlocked:
 		default:
-			return Lang::Viewer((user->isBot() && !user->isSupport())
-				? lng_profile_block_bot
-				: lng_profile_block_user);
+			return ((user->isBot() && !user->isSupport())
+				? tr::lng_profile_block_bot
+				: tr::lng_profile_block_user)();
 		}
 	}) | rpl::flatten_latest(
 	) | rpl::start_spawning(_wrap->lifetime());
@@ -622,7 +624,7 @@ void ActionsFiller::addLeaveChannelAction(
 		not_null<ChannelData*> channel) {
 	AddActionButton(
 		_wrap,
-		Lang::Viewer(lng_profile_leave_channel),
+		tr::lng_profile_leave_channel(),
 		AmInChannelValue(channel),
 		Window::DeleteAndLeaveHandler(channel));
 }
@@ -635,7 +637,7 @@ void ActionsFiller::addJoinChannelAction(
 		| rpl::start_spawning(_wrap->lifetime());
 	AddActionButton(
 		_wrap,
-		Lang::Viewer(lng_profile_join_channel),
+		tr::lng_profile_join_channel(),
 		rpl::duplicate(joinVisible),
 		[channel] { Auth().api().joinChannel(channel); });
 	_wrap->add(object_ptr<Ui::SlideWrap<Ui::FixedHeightWidget>>(
@@ -736,7 +738,7 @@ object_ptr<Ui::RpWidget> ActionsFiller::fill() {
 //	const auto feedId = _feed->id();
 //	auto result = object_ptr<Button>(
 //		_wrap,
-//		Lang::Viewer(lng_info_feed_is_default),
+//		tr::lng_info_feed_is_default(),
 //		st::infoNotificationsButton);
 //	result->toggleOn(
 //		Auth().data().defaultFeedIdValue(
diff --git a/Telegram/SourceFiles/info/profile/info_profile_cover.cpp b/Telegram/SourceFiles/info/profile/info_profile_cover.cpp
index 582440404..16507b325 100644
--- a/Telegram/SourceFiles/info/profile/info_profile_cover.cpp
+++ b/Telegram/SourceFiles/info/profile/info_profile_cover.cpp
@@ -447,7 +447,7 @@ void SharedMediaCover::createLabel() {
 	using namespace rpl::mappers;
 	auto label = object_ptr<Ui::FlatLabel>(
 		this,
-		Lang::Viewer(lng_profile_shared_media) | Ui::Text::ToUpper(),
+		tr::lng_profile_shared_media() | Ui::Text::ToUpper(),
 		st::infoBlockHeaderLabel);
 	label->setAttribute(Qt::WA_TransparentForMouseEvents);
 
diff --git a/Telegram/SourceFiles/info/profile/info_profile_values.cpp b/Telegram/SourceFiles/info/profile/info_profile_values.cpp
index 7375456d6..e4b9f5c04 100644
--- a/Telegram/SourceFiles/info/profile/info_profile_values.cpp
+++ b/Telegram/SourceFiles/info/profile/info_profile_values.cpp
@@ -11,6 +11,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "core/application.h"
 #include "auth_session.h"
 #include "ui/wrap/slide_wrap.h"
+#include "ui/text/text_utilities.h"
 #include "data/data_peer_values.h"
 #include "data/data_shared_media.h"
 #include "data/data_folder.h"
@@ -30,7 +31,7 @@ rpl::producer<TextWithEntities> NameValue(not_null<PeerData*> peer) {
 		Notify::PeerUpdate::Flag::NameChanged
 	) | rpl::map([=] {
 		return App::peerName(peer);
-	}) | WithEmptyEntities();
+	}) | Ui::Text::ToWithEntities();
 }
 
 rpl::producer<TextWithEntities> PhoneValue(not_null<UserData*> user) {
@@ -39,7 +40,7 @@ rpl::producer<TextWithEntities> PhoneValue(not_null<UserData*> user) {
 			Notify::PeerUpdate::Flag::UserPhoneChanged
 	) | rpl::map([user] {
 		return App::formatPhone(user->phone());
-	}) | WithEmptyEntities();
+	}) | Ui::Text::ToWithEntities();
 }
 
 auto PlainBioValue(not_null<UserData*> user) {
@@ -52,7 +53,7 @@ auto PlainBioValue(not_null<UserData*> user) {
 rpl::producer<TextWithEntities> BioValue(not_null<UserData*> user) {
 	return PlainBioValue(user)
 		| ToSingleLine()
-		| WithEmptyEntities();
+		| Ui::Text::ToWithEntities();
 }
 
 auto PlainUsernameValue(not_null<PeerData*> peer) {
@@ -71,7 +72,7 @@ rpl::producer<TextWithEntities> UsernameValue(not_null<UserData*> user) {
 		return username.isEmpty()
 			? QString()
 			: ('@' + username);
-	}) | WithEmptyEntities();
+	}) | Ui::Text::ToWithEntities();
 }
 
 rpl::producer<QString> PlainAboutValue(not_null<PeerData*> peer) {
@@ -95,7 +96,7 @@ rpl::producer<TextWithEntities> AboutValue(not_null<PeerData*> peer) {
 	}
 	return PlainAboutValue(
 		peer
-	) | WithEmptyEntities(
+	) | Ui::Text::ToWithEntities(
 	) | rpl::map([=](TextWithEntities &&text) {
 		TextUtilities::ParseEntities(text, flags);
 		return std::move(text);
diff --git a/Telegram/SourceFiles/info/profile/info_profile_values.h b/Telegram/SourceFiles/info/profile/info_profile_values.h
index c3f71bb47..346d1a9f0 100644
--- a/Telegram/SourceFiles/info/profile/info_profile_values.h
+++ b/Telegram/SourceFiles/info/profile/info_profile_values.h
@@ -30,12 +30,6 @@ inline auto ToSingleLine() {
 	});
 }
 
-inline auto WithEmptyEntities() {
-	return rpl::map([](QString &&text) {
-		return TextWithEntities{ std::move(text), {} };
-	});
-}
-
 rpl::producer<TextWithEntities> NameValue(not_null<PeerData*> peer);
 rpl::producer<TextWithEntities> PhoneValue(not_null<UserData*> user);
 rpl::producer<TextWithEntities> BioValue(not_null<UserData*> user);
diff --git a/Telegram/SourceFiles/lang/lang_instance.cpp b/Telegram/SourceFiles/lang/lang_instance.cpp
index 678d85658..db4741bf2 100644
--- a/Telegram/SourceFiles/lang/lang_instance.cpp
+++ b/Telegram/SourceFiles/lang/lang_instance.cpp
@@ -780,18 +780,21 @@ Instance &Current() {
 	return Core::App().langpack();
 }
 
+namespace details {
+
 QString Current(LangKey key) {
-	return Current().getValue(key);
+	return Lang::Current().getValue(key);
 }
 
 rpl::producer<QString> Viewer(LangKey key) {
 	return rpl::single(
-		Current().getValue(key)
+		Lang::Current().getValue(key)
 	) | then(base::ObservableViewer(
-		Current().updated()
+		Lang::Current().updated()
 	) | rpl::map([=] {
-		return Current().getValue(key);
+		return Lang::Current().getValue(key);
 	}));
 }
 
+} // namespace details
 } // namespace Lang
diff --git a/Telegram/SourceFiles/lang/lang_instance.h b/Telegram/SourceFiles/lang/lang_instance.h
index 803eb4870..69c93ca55 100644
--- a/Telegram/SourceFiles/lang/lang_instance.h
+++ b/Telegram/SourceFiles/lang/lang_instance.h
@@ -56,9 +56,6 @@ Language DefaultLanguage();
 class Instance;
 Instance &Current();
 
-QString Current(LangKey key);
-rpl::producer<QString> Viewer(LangKey key);
-
 enum class Pack {
 	None,
 	Current,
@@ -162,4 +159,10 @@ private:
 
 };
 
+namespace details {
+
+QString Current(LangKey key);
+rpl::producer<QString> Viewer(LangKey key);
+
+} // namespace details
 } // namespace Lang
diff --git a/Telegram/SourceFiles/lang/lang_values.h b/Telegram/SourceFiles/lang/lang_values.h
index 6d393543a..a27b0b139 100644
--- a/Telegram/SourceFiles/lang/lang_values.h
+++ b/Telegram/SourceFiles/lang/lang_values.h
@@ -13,14 +13,13 @@ enum LangKey : int;
 enum lngtag_count : int;
 
 namespace Lang {
-
-QString Current(LangKey key);
-rpl::producer<QString> Viewer(LangKey key);
-
 namespace details {
 
 inline constexpr auto kPluralCount = 6;
 
+QString Current(LangKey key);
+rpl::producer<QString> Viewer(LangKey key);
+
 template <typename Tag> struct TagValue;
 
 template <int Index, typename Type, typename Tuple>
@@ -90,7 +89,9 @@ struct Producer {
 		typename T = decltype(std::declval<P>()(QString())),
 		typename ...Values>
 	static T Current(LangKey base, P p, const Values &...values) {
-		return ReplaceUnwrap<Tags...>::template Call(p(Lang::Current(base)), values...);
+		return ReplaceUnwrap<Tags...>::template Call(
+			p(Lang::details::Current(base)),
+			values...);
 	}
 };
 
@@ -107,7 +108,7 @@ struct Producer<> {
 		typename P,
 		typename T = decltype(std::declval<P>()(QString()))>
 	static T Current(LangKey base, P p) {
-		return p(Lang::Current(base));
+		return p(Lang::details::Current(base));
 	}
 };
 
@@ -169,7 +170,7 @@ struct Producer<lngtag_count, Tags...> {
 		auto plural = Plural(base, count, type);
 		return ReplaceUnwrap<Tags...>::template Call(
 			ReplaceTag<T>::Call(
-				p(Lang::Current(LangKey(base + plural.keyShift))),
+				p(Lang::details::Current(LangKey(base + plural.keyShift))),
 				type,
 				StartReplacements<T>::Call(
 					std::move(plural.replacement))),
diff --git a/Telegram/SourceFiles/passport/passport_panel.cpp b/Telegram/SourceFiles/passport/passport_panel.cpp
index 4ed1b138e..b1618189d 100644
--- a/Telegram/SourceFiles/passport/passport_panel.cpp
+++ b/Telegram/SourceFiles/passport/passport_panel.cpp
@@ -23,7 +23,7 @@ namespace Passport {
 Panel::Panel(not_null<PanelController*> controller)
 : _controller(controller)
 , _widget(std::make_unique<Ui::SeparatePanel>()) {
-	_widget->setTitle(Lang::Viewer(lng_passport_title));
+	_widget->setTitle(tr::lng_passport_title());
 	_widget->setInnerSize(st::passportPanelSize);
 
 	_widget->closeRequests(
diff --git a/Telegram/SourceFiles/passport/passport_panel_controller.cpp b/Telegram/SourceFiles/passport/passport_panel_controller.cpp
index 4e45270ff..29441a08b 100644
--- a/Telegram/SourceFiles/passport/passport_panel_controller.cpp
+++ b/Telegram/SourceFiles/passport/passport_panel_controller.cpp
@@ -829,21 +829,21 @@ auto PanelController::deleteValueLabel() const
 	Expects(_editScope != nullptr);
 
 	if (hasValueDocument()) {
-		return Lang::Viewer(lng_passport_delete_document);
+		return tr::lng_passport_delete_document();
 	} else if (!hasValueFields()) {
 		return std::nullopt;
 	}
 	switch (_editScope->type) {
 	case Scope::Type::PersonalDetails:
 	case Scope::Type::Identity:
-		return Lang::Viewer(lng_passport_delete_details);
+		return tr::lng_passport_delete_details();
 	case Scope::Type::AddressDetails:
 	case Scope::Type::Address:
-		return Lang::Viewer(lng_passport_delete_address);
+		return tr::lng_passport_delete_address();
 	case Scope::Type::Email:
-		return Lang::Viewer(lng_passport_delete_email);
+		return tr::lng_passport_delete_email();
 	case Scope::Type::Phone:
-		return Lang::Viewer(lng_passport_delete_phone);
+		return tr::lng_passport_delete_phone();
 	}
 	Unexpected("Type in PanelController::deleteValueLabel.");
 }
diff --git a/Telegram/SourceFiles/passport/passport_panel_edit_contact.cpp b/Telegram/SourceFiles/passport/passport_panel_edit_contact.cpp
index 16983dfb2..602da990b 100644
--- a/Telegram/SourceFiles/passport/passport_panel_edit_contact.cpp
+++ b/Telegram/SourceFiles/passport/passport_panel_edit_contact.cpp
@@ -234,15 +234,11 @@ void PanelEditContact::setupControls(
 		_content->add(
 			object_ptr<Info::Profile::Button>(
 				_content,
-				Lang::Viewer(
-					lng_passport_use_existing__tagged
-				) | rpl::map([=] {
-					return lng_passport_use_existing(
-						lt_existing,
-						(_scheme.format
-							? _scheme.format(existing)
-							: existing));
-				}),
+				tr::lng_passport_use_existing(
+					lt_existing,
+					rpl::single(_scheme.format
+						? _scheme.format(existing)
+						: existing)),
 				st::passportUploadButton),
 			st::passportUploadButtonPadding
 		)->addClickHandler([=] {
diff --git a/Telegram/SourceFiles/passport/passport_panel_edit_scans.cpp b/Telegram/SourceFiles/passport/passport_panel_edit_scans.cpp
index 4dac5181a..5cce71631 100644
--- a/Telegram/SourceFiles/passport/passport_panel_edit_scans.cpp
+++ b/Telegram/SourceFiles/passport/passport_panel_edit_scans.cpp
@@ -210,9 +210,9 @@ Ui::SlideWrap<ScanButton> *EditScans::List::nonDeletedErrorRow() const {
 }
 
 rpl::producer<QString> EditScans::List::uploadButtonText() const {
-	return Lang::Viewer(files.empty()
-		? lng_passport_upload_scans
-		: lng_passport_upload_more) | Ui::Text::ToUpper();
+	return (files.empty()
+		? tr::lng_passport_upload_scans
+		: tr::lng_passport_upload_more)() | Ui::Text::ToUpper();
 }
 
 void EditScans::List::hideError() {
@@ -611,37 +611,37 @@ void EditScans::setupSpecialScans(
 		}
 		Unexpected("Type in special row title.");
 	};
-	const auto uploadKey = [=](FileType type, bool hasScan) {
+	const auto uploadText = [=](FileType type, bool hasScan) {
 		switch (type) {
 		case FileType::FrontSide:
 			return requiresBothSides
 				? (hasScan
-					? lng_passport_reupload_front_side
-					: lng_passport_upload_front_side)
+					? tr::lng_passport_reupload_front_side
+					: tr::lng_passport_upload_front_side)
 				: (hasScan
-					? lng_passport_reupload_main_page
-					: lng_passport_upload_main_page);
+					? tr::lng_passport_reupload_main_page
+					: tr::lng_passport_upload_main_page);
 		case FileType::ReverseSide:
 			return hasScan
-				? lng_passport_reupload_reverse_side
-				: lng_passport_upload_reverse_side;
+				? tr::lng_passport_reupload_reverse_side
+				: tr::lng_passport_upload_reverse_side;
 		case FileType::Selfie:
 			return hasScan
-				? lng_passport_reupload_selfie
-				: lng_passport_upload_selfie;
+				? tr::lng_passport_reupload_selfie
+				: tr::lng_passport_upload_selfie;
 		}
 		Unexpected("Type in special row upload key.");
 	};
 	const auto description = [&](FileType type) {
 		switch (type) {
 		case FileType::FrontSide:
-			return lang(requiresBothSides
-				? lng_passport_front_side_description
-				: lng_passport_main_page_description);
+			return requiresBothSides
+				? tr::lng_passport_front_side_description
+				: tr::lng_passport_main_page_description;
 		case FileType::ReverseSide:
-			return lang(lng_passport_reverse_side_description);
+			return tr::lng_passport_reverse_side_description;
 		case FileType::Selfie:
-			return lang(lng_passport_selfie_description);
+			return tr::lng_passport_selfie_description;
 		}
 		Unexpected("Type in special row upload key.");
 	};
@@ -684,7 +684,7 @@ void EditScans::setupSpecialScans(
 		}
 		auto label = scan.rowCreated.value(
 		) | rpl::map([=, type = type](bool created) {
-			return Lang::Viewer(uploadKey(type, created));
+			return uploadText(type, created)();
 		}) | rpl::flatten_latest(
 		) | Ui::Text::ToUpper();
 		scan.upload = inner->add(
@@ -701,7 +701,7 @@ void EditScans::setupSpecialScans(
 			inner,
 			object_ptr<Ui::FlatLabel>(
 				inner,
-				description(type),
+				description(type)(tr::now),
 				st::boxDividerLabel),
 			st::passportFormLabelPadding));
 	}
diff --git a/Telegram/SourceFiles/settings/settings_advanced.cpp b/Telegram/SourceFiles/settings/settings_advanced.cpp
index 34ec98bac..0ed64e5e7 100644
--- a/Telegram/SourceFiles/settings/settings_advanced.cpp
+++ b/Telegram/SourceFiles/settings/settings_advanced.cpp
@@ -57,7 +57,7 @@ void SetupConnectionType(not_null<Ui::VerticalLayout*> container) {
 	};
 	const auto button = AddButtonWithLabel(
 		container,
-		lng_settings_connection_type,
+		tr::lng_settings_connection_type(),
 		rpl::single(
 			rpl::empty_value()
 		) | rpl::then(base::ObservableViewer(
@@ -88,7 +88,7 @@ void SetupUpdate(not_null<Ui::VerticalLayout*> container) {
 		currentVersionText());
 	const auto toggle = AddButton(
 		container,
-		lng_settings_update_automatically,
+		tr::lng_settings_update_automatically(),
 		st::settingsUpdateToggle);
 	const auto label = Ui::CreateChild<Ui::FlatLabel>(
 		toggle.get(),
@@ -102,16 +102,16 @@ void SetupUpdate(not_null<Ui::VerticalLayout*> container) {
 	const auto inner = options->entity();
 	const auto install = cAlphaVersion() ? nullptr : AddButton(
 		inner,
-		lng_settings_install_beta,
+		tr::lng_settings_install_beta(),
 		st::settingsButton).get();
 
 	const auto check = AddButton(
 		inner,
-		lng_settings_check_now,
+		tr::lng_settings_check_now(),
 		st::settingsButton);
 	const auto update = Ui::CreateChild<Button>(
 		check.get(),
-		Lang::Viewer(lng_update_telegram) | Ui::Text::ToUpper(),
+		tr::lng_update_telegram() | Ui::Text::ToUpper(),
 		st::settingsUpdate);
 	update->hide();
 	check->widthValue() | rpl::start_with_next([=](int width) {
@@ -403,7 +403,7 @@ void SetupTray(not_null<Ui::VerticalLayout*> container) {
 void SetupAnimations(not_null<Ui::VerticalLayout*> container) {
 	AddButton(
 		container,
-		lng_settings_enable_animations,
+		tr::lng_settings_enable_animations(),
 		st::settingsButton
 	)->toggleOn(
 		rpl::single(!anim::Disabled())
@@ -421,7 +421,7 @@ void SetupPerformance(not_null<Ui::VerticalLayout*> container) {
 
 	AddButton(
 		container,
-		lng_settings_autoplay_gifs,
+		tr::lng_settings_autoplay_gifs(),
 		st::settingsButton
 	)->toggleOn(
 		rpl::single(cAutoPlayGif())
@@ -442,10 +442,10 @@ void SetupSystemIntegration(
 		Fn<void(Type)> showOther) {
 	AddDivider(container);
 	AddSkip(container);
-	AddSubsectionTitle(container, lng_settings_system_integration);
+	AddSubsectionTitle(container, tr::lng_settings_system_integration());
 	AddButton(
 		container,
-		lng_settings_section_call_settings,
+		tr::lng_settings_section_call_settings(),
 		st::settingsButton
 	)->addClickHandler([=] {
 		showOther(Type::Calls);
@@ -478,7 +478,7 @@ void Advanced::setupContent() {
 		if (HasUpdate()) {
 			addDivider();
 			AddSkip(content);
-			AddSubsectionTitle(content, lng_settings_version_info);
+			AddSubsectionTitle(content, tr::lng_settings_version_info());
 			SetupUpdate(content);
 			AddSkip(content);
 		}
@@ -489,7 +489,7 @@ void Advanced::setupContent() {
 	if (HasConnectionType()) {
 		addDivider();
 		AddSkip(content);
-		AddSubsectionTitle(content, lng_settings_network_proxy);
+		AddSubsectionTitle(content, tr::lng_settings_network_proxy());
 		SetupConnectionType(content);
 		AddSkip(content);
 	}
@@ -501,7 +501,7 @@ void Advanced::setupContent() {
 
 	AddDivider(content);
 	AddSkip(content);
-	AddSubsectionTitle(content, lng_settings_performance);
+	AddSubsectionTitle(content, tr::lng_settings_performance());
 	SetupPerformance(content);
 	AddSkip(content);
 
diff --git a/Telegram/SourceFiles/settings/settings_calls.cpp b/Telegram/SourceFiles/settings/settings_calls.cpp
index 8ee23d4eb..51be4c93f 100644
--- a/Telegram/SourceFiles/settings/settings_calls.cpp
+++ b/Telegram/SourceFiles/settings/settings_calls.cpp
@@ -96,10 +96,10 @@ void Calls::setupContent() {
 	}();
 
 	AddSkip(content);
-	AddSubsectionTitle(content, lng_settings_call_section_output);
+	AddSubsectionTitle(content, tr::lng_settings_call_section_output());
 	AddButtonWithLabel(
 		content,
-		lng_settings_call_output_device,
+		tr::lng_settings_call_output_device(),
 		rpl::single(
 			currentOutputName
 		) | rpl::then(
@@ -171,10 +171,10 @@ void Calls::setupContent() {
 	AddSkip(content);
 	AddDivider(content);
 	AddSkip(content);
-	AddSubsectionTitle(content, lng_settings_call_section_input);
+	AddSubsectionTitle(content, tr::lng_settings_call_section_input());
 	AddButtonWithLabel(
 		content,
-		lng_settings_call_input_device,
+		tr::lng_settings_call_input_device(),
 		rpl::single(
 			currentInputName
 		) | rpl::then(
@@ -276,12 +276,12 @@ void Calls::setupContent() {
 	AddSkip(content);
 	AddDivider(content);
 	AddSkip(content);
-	AddSubsectionTitle(content, lng_settings_call_section_other);
+	AddSubsectionTitle(content, tr::lng_settings_call_section_other());
 
 #if defined Q_OS_MAC && !defined OS_MAC_STORE
 	AddButton(
 		content,
-		lng_settings_call_audio_ducking,
+		tr::lng_settings_call_audio_ducking(),
 		st::settingsButton
 	)->toggleOn(
 		rpl::single(Global::CallAudioDuckingEnabled())
@@ -298,7 +298,7 @@ void Calls::setupContent() {
 
 	AddButton(
 		content,
-		lng_settings_call_open_system_prefs,
+		tr::lng_settings_call_open_system_prefs(),
 		st::settingsButton
 	)->addClickHandler([] {
 		const auto opened = Platform::OpenSystemSettings(
diff --git a/Telegram/SourceFiles/settings/settings_chat.cpp b/Telegram/SourceFiles/settings/settings_chat.cpp
index 222654b96..527626612 100644
--- a/Telegram/SourceFiles/settings/settings_chat.cpp
+++ b/Telegram/SourceFiles/settings/settings_chat.cpp
@@ -419,7 +419,7 @@ void SetupStickersEmoji(not_null<Ui::VerticalLayout*> container) {
 	AddDivider(container);
 	AddSkip(container);
 
-	AddSubsectionTitle(container, lng_settings_stickers_emoji);
+	AddSubsectionTitle(container, tr::lng_settings_stickers_emoji());
 
 	auto wrap = object_ptr<Ui::VerticalLayout>(container);
 	const auto inner = wrap.data();
@@ -471,7 +471,7 @@ void SetupStickersEmoji(not_null<Ui::VerticalLayout*> container) {
 
 	AddButton(
 		container,
-		lng_stickers_you_have,
+		tr::lng_stickers_you_have(),
 		st::settingsChatButton,
 		&st::settingsIconStickers,
 		st::settingsChatIconLeft
@@ -481,7 +481,7 @@ void SetupStickersEmoji(not_null<Ui::VerticalLayout*> container) {
 
 	AddButton(
 		container,
-		lng_emoji_manage_sets,
+		tr::lng_emoji_manage_sets(),
 		st::settingsChatButton,
 		&st::settingsIconEmoji,
 		st::settingsChatIconLeft
@@ -496,7 +496,7 @@ void SetupMessages(not_null<Ui::VerticalLayout*> container) {
 	AddDivider(container);
 	AddSkip(container);
 
-	AddSubsectionTitle(container, lng_settings_messages);
+	AddSubsectionTitle(container, tr::lng_settings_messages());
 
 	AddSkip(container, st::settingsSendTypeSkip);
 
@@ -546,7 +546,7 @@ void SetupMessages(not_null<Ui::VerticalLayout*> container) {
 void SetupExport(not_null<Ui::VerticalLayout*> container) {
 	AddButton(
 		container,
-		lng_settings_export_data,
+		tr::lng_settings_export_data(),
 		st::settingsButton
 	)->addClickHandler([] {
 		Ui::hideSettingsAndLayer();
@@ -560,7 +560,7 @@ void SetupExport(not_null<Ui::VerticalLayout*> container) {
 void SetupLocalStorage(not_null<Ui::VerticalLayout*> container) {
 	AddButton(
 		container,
-		lng_settings_manage_local_storage,
+		tr::lng_settings_manage_local_storage(),
 		st::settingsButton
 	)->addClickHandler([] {
 		LocalStorageBox::Show(
@@ -575,11 +575,11 @@ void SetupDataStorage(not_null<Ui::VerticalLayout*> container) {
 	AddDivider(container);
 	AddSkip(container);
 
-	AddSubsectionTitle(container, lng_settings_data_storage);
+	AddSubsectionTitle(container, tr::lng_settings_data_storage());
 
 	const auto ask = AddButton(
 		container,
-		lng_download_path_ask,
+		tr::lng_download_path_ask(),
 		st::settingsButton
 	)->toggleOn(rpl::single(Global::AskDownloadPath()));
 
@@ -590,7 +590,7 @@ void SetupDataStorage(not_null<Ui::VerticalLayout*> container) {
 			container,
 			object_ptr<Button>(
 				container,
-				Lang::Viewer(lng_download_path),
+				tr::lng_download_path(),
 				st::settingsButton)));
 	auto pathtext = rpl::single(
 		rpl::empty_value()
@@ -603,7 +603,7 @@ void SetupDataStorage(not_null<Ui::VerticalLayout*> container) {
 		path->entity(),
 		std::move(pathtext),
 		st::settingsButton,
-		lng_download_path);
+		tr::lng_download_path());
 	path->entity()->addClickHandler([] {
 		Ui::show(Box<DownloadPathBox>());
 	});
@@ -633,21 +633,21 @@ void SetupAutoDownload(not_null<Ui::VerticalLayout*> container) {
 	AddDivider(container);
 	AddSkip(container);
 
-	AddSubsectionTitle(container, lng_media_auto_settings);
+	AddSubsectionTitle(container, tr::lng_media_auto_settings());
 
 	using Source = Data::AutoDownload::Source;
-	const auto add = [&](LangKey label, Source source) {
+	const auto add = [&](rpl::producer<QString> label, Source source) {
 		AddButton(
 			container,
-			label,
+			std::move(label),
 			st::settingsButton
 		)->addClickHandler([=] {
 			Ui::show(Box<AutoDownloadBox>(source));
 		});
 	};
-	add(lng_media_auto_in_private, Source::User);
-	add(lng_media_auto_in_groups, Source::Group);
-	add(lng_media_auto_in_channels, Source::Channel);
+	add(tr::lng_media_auto_in_private(), Source::User);
+	add(tr::lng_media_auto_in_groups(), Source::Group);
+	add(tr::lng_media_auto_in_channels(), Source::Channel);
 
 	AddSkip(container, st::settingsCheckboxesSkip);
 }
@@ -656,7 +656,7 @@ void SetupChatBackground(not_null<Ui::VerticalLayout*> container) {
 	AddDivider(container);
 	AddSkip(container);
 
-	AddSubsectionTitle(container, lng_settings_section_background);
+	AddSubsectionTitle(container, tr::lng_settings_section_background());
 
 	container->add(
 		object_ptr<BackgroundRow>(container),
@@ -905,7 +905,7 @@ void SetupDefaultThemes(not_null<Ui::VerticalLayout*> container) {
 void SetupThemeOptions(not_null<Ui::VerticalLayout*> container) {
 	AddSkip(container, st::settingsPrivacySkip);
 
-	AddSubsectionTitle(container, lng_settings_themes);
+	AddSubsectionTitle(container, tr::lng_settings_themes());
 
 	AddSkip(container, st::settingsThemesTopSkip);
 	SetupDefaultThemes(container);
@@ -913,7 +913,7 @@ void SetupThemeOptions(not_null<Ui::VerticalLayout*> container) {
 
 	AddButton(
 		container,
-		lng_settings_bg_edit_theme,
+		tr::lng_settings_bg_edit_theme(),
 		st::settingsChatButton,
 		&st::settingsIconThemes,
 		st::settingsChatIconLeft
diff --git a/Telegram/SourceFiles/settings/settings_common.cpp b/Telegram/SourceFiles/settings/settings_common.cpp
index 53e3a68fd..7cf8b27ef 100644
--- a/Telegram/SourceFiles/settings/settings_common.cpp
+++ b/Telegram/SourceFiles/settings/settings_common.cpp
@@ -77,15 +77,6 @@ void AddDividerText(
 		st::settingsDividerLabelPadding));
 }
 
-not_null<Button*> AddButton(
-		not_null<Ui::VerticalLayout*> container,
-		LangKey text,
-		const style::InfoProfileButton &st,
-		const style::icon *leftIcon,
-		int iconLeft) {
-	return AddButton(container, Lang::Viewer(text), st, leftIcon, iconLeft);
-}
-
 not_null<Button*> AddButton(
 		not_null<Ui::VerticalLayout*> container,
 		rpl::producer<QString> text,
@@ -127,13 +118,13 @@ void CreateRightLabel(
 		not_null<Button*> button,
 		rpl::producer<QString> label,
 		const style::InfoProfileButton &st,
-		LangKey buttonText) {
+		rpl::producer<QString> buttonText) {
 	const auto name = Ui::CreateChild<Ui::FlatLabel>(
 		button.get(),
 		st::settingsButtonRight);
 	rpl::combine(
 		button->widthValue(),
-		Lang::Viewer(buttonText),
+		std::move(buttonText),
 		std::move(label)
 	) | rpl::start_with_next([=, &st](
 			int width,
@@ -153,13 +144,18 @@ void CreateRightLabel(
 
 not_null<Button*> AddButtonWithLabel(
 		not_null<Ui::VerticalLayout*> container,
-		LangKey text,
+		rpl::producer<QString> text,
 		rpl::producer<QString> label,
 		const style::InfoProfileButton &st,
 		const style::icon *leftIcon,
 		int iconLeft) {
-	const auto button = AddButton(container, text, st, leftIcon, iconLeft);
-	CreateRightLabel(button, std::move(label), st, text);
+	const auto button = AddButton(
+		container,
+		rpl::duplicate(text),
+		st,
+		leftIcon,
+		iconLeft);
+	CreateRightLabel(button, std::move(label), st, std::move(text));
 	return button;
 }
 
@@ -174,12 +170,6 @@ void AddSubsectionTitle(
 		st::settingsSubsectionTitlePadding);
 }
 
-void AddSubsectionTitle(
-		not_null<Ui::VerticalLayout*> container,
-		LangKey text) {
-	AddSubsectionTitle(container, Lang::Viewer(text));
-}
-
 void FillMenu(Fn<void(Type)> showOther, MenuCallback addAction) {
 	if (!Auth().supportMode()) {
 		addAction(
diff --git a/Telegram/SourceFiles/settings/settings_common.h b/Telegram/SourceFiles/settings/settings_common.h
index bb5b3d6b9..ed15c93fb 100644
--- a/Telegram/SourceFiles/settings/settings_common.h
+++ b/Telegram/SourceFiles/settings/settings_common.h
@@ -9,8 +9,6 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include "ui/rp_widget.h"
 
-enum LangKey : int;
-
 namespace Ui {
 class VerticalLayout;
 } // namespace Ui
@@ -71,12 +69,6 @@ void AddDivider(not_null<Ui::VerticalLayout*> container);
 void AddDividerText(
 	not_null<Ui::VerticalLayout*> container,
 	rpl::producer<QString> text);
-not_null<Button*> AddButton(
-	not_null<Ui::VerticalLayout*> container,
-	LangKey text,
-	const style::InfoProfileButton &st,
-	const style::icon *leftIcon = nullptr,
-	int iconLeft = 0);
 not_null<Button*> AddButton(
 	not_null<Ui::VerticalLayout*> container,
 	rpl::producer<QString> text,
@@ -85,7 +77,7 @@ not_null<Button*> AddButton(
 	int iconLeft = 0);
 not_null<Button*> AddButtonWithLabel(
 	not_null<Ui::VerticalLayout*> container,
-	LangKey text,
+	rpl::producer<QString> text,
 	rpl::producer<QString> label,
 	const style::InfoProfileButton &st,
 	const style::icon *leftIcon = nullptr,
@@ -94,13 +86,10 @@ void CreateRightLabel(
 	not_null<Button*> button,
 	rpl::producer<QString> label,
 	const style::InfoProfileButton &st,
-	LangKey buttonText);
+	rpl::producer<QString> buttonText);
 void AddSubsectionTitle(
 	not_null<Ui::VerticalLayout*> container,
 	rpl::producer<QString> text);
-void AddSubsectionTitle(
-	not_null<Ui::VerticalLayout*> conatiner,
-	LangKey text);
 
 using MenuCallback = Fn<QAction*(
 	const QString &text,
diff --git a/Telegram/SourceFiles/settings/settings_information.cpp b/Telegram/SourceFiles/settings/settings_information.cpp
index 256e5453a..ae6bc49f3 100644
--- a/Telegram/SourceFiles/settings/settings_information.cpp
+++ b/Telegram/SourceFiles/settings/settings_information.cpp
@@ -218,17 +218,17 @@ void SetupRows(
 
 	AddRow(
 		container,
-		Lang::Viewer(lng_settings_name_label),
+		tr::lng_settings_name_label(),
 		Info::Profile::NameValue(self),
-		lang(lng_profile_copy_fullname),
+		tr::lng_profile_copy_fullname(tr::now),
 		[=] { Ui::show(Box<EditNameBox>(self)); },
 		st::settingsInfoName);
 
 	AddRow(
 		container,
-		Lang::Viewer(lng_settings_phone_label),
+		tr::lng_settings_phone_label(),
 		Info::Profile::PhoneValue(self),
-		lang(lng_profile_copy_phone),
+		tr::lng_profile_copy_phone(tr::now),
 		[] { Ui::show(Box<ChangePhoneBox>()); },
 		st::settingsInfoPhone);
 
@@ -239,14 +239,14 @@ void SetupRows(
 		return username.text.isEmpty();
 	});
 	auto label = rpl::combine(
-		Lang::Viewer(lng_settings_username_label),
+		tr::lng_settings_username_label(),
 		std::move(empty)
 	) | rpl::map([](const QString &label, bool empty) {
 		return empty ? "t.me/username" : label;
 	});
 	auto value = rpl::combine(
 		std::move(username),
-		Lang::Viewer(lng_settings_username_add)
+		tr::lng_settings_username_add()
 	) | rpl::map([](const TextWithEntities &username, const QString &add) {
 		if (!username.text.isEmpty()) {
 			return username;
@@ -263,7 +263,7 @@ void SetupRows(
 		container,
 		std::move(label),
 		std::move(value),
-		lang(lng_context_copy_mention),
+		tr::lng_context_copy_mention(tr::now),
 		[=] { Ui::show(Box<UsernameBox>()); },
 		st::settingsInfoUsername);
 
@@ -392,7 +392,7 @@ BioManager SetupBio(
 	container->add(
 		object_ptr<Ui::FlatLabel>(
 			container,
-			Lang::Viewer(lng_settings_about_bio),
+			tr::lng_settings_about_bio(),
 			st::boxDividerLabel),
 		st::settingsBioLabelPadding);
 
diff --git a/Telegram/SourceFiles/settings/settings_intro.cpp b/Telegram/SourceFiles/settings/settings_intro.cpp
index 3ea3b2449..bb994caaf 100644
--- a/Telegram/SourceFiles/settings/settings_intro.cpp
+++ b/Telegram/SourceFiles/settings/settings_intro.cpp
@@ -268,7 +268,7 @@ void IntroWidget::forceContentRepaint() {
 
 void IntroWidget::createTopBar() {
 	_topBar.create(this, st::infoLayerTopBar);
-	_topBar->setTitle(Lang::Viewer(lng_menu_settings));
+	_topBar->setTitle(tr::lng_menu_settings());
 	auto close = _topBar->addButton(
 		base::make_unique_q<Ui::IconButton>(
 			_topBar,
diff --git a/Telegram/SourceFiles/settings/settings_main.cpp b/Telegram/SourceFiles/settings/settings_main.cpp
index dc7ff2ef4..38305d77d 100644
--- a/Telegram/SourceFiles/settings/settings_main.cpp
+++ b/Telegram/SourceFiles/settings/settings_main.cpp
@@ -34,7 +34,7 @@ void SetupLanguageButton(
 		bool icon) {
 	const auto button = AddButtonWithLabel(
 		container,
-		lng_settings_language,
+		tr::lng_settings_language(),
 		rpl::single(Lang::Current().nativeName()),
 		icon ? st::settingsSectionButton : st::settingsButton,
 		icon ? &st::settingsIconLanguage : nullptr);
@@ -56,12 +56,12 @@ void SetupSections(
 	AddSkip(container);
 
 	const auto addSection = [&](
-			LangKey label,
+			rpl::producer<QString> label,
 			Type type,
 			const style::icon *icon) {
 		AddButton(
 			container,
-			label,
+			std::move(label),
 			st::settingsSectionButton,
 			icon
 		)->addClickHandler([=] { showOther(type); });
@@ -73,24 +73,24 @@ void SetupSections(
 		AddSkip(container);
 	} else {
 		addSection(
-			lng_settings_information,
+			tr::lng_settings_information(),
 			Type::Information,
 			&st::settingsIconInformation);
 	}
 	addSection(
-		lng_settings_section_notify,
+		tr::lng_settings_section_notify(),
 		Type::Notifications,
 		&st::settingsIconNotifications);
 	addSection(
-		lng_settings_section_privacy,
+		tr::lng_settings_section_privacy(),
 		Type::PrivacySecurity,
 		&st::settingsIconPrivacySecurity);
 	addSection(
-		lng_settings_section_chat_settings,
+		tr::lng_settings_section_chat_settings(),
 		Type::Chat,
 		&st::settingsIconChat);
 	addSection(
-		lng_settings_advanced,
+		tr::lng_settings_advanced(),
 		Type::Advanced,
 		&st::settingsIconGeneral);
 
@@ -116,7 +116,7 @@ void SetupInterfaceScale(
 	const auto switched = (cConfigScale() == kInterfaceScaleAuto);
 	const auto button = AddButton(
 		container,
-		lng_settings_default_scale,
+		tr::lng_settings_default_scale(),
 		icon ? st::settingsSectionButton : st::settingsButton,
 		icon ? &st::settingsIconInterfaceScale : nullptr
 	)->toggleOn(toggled->events_starting_with_copy(switched));
@@ -216,7 +216,7 @@ void OpenFaq() {
 void SetupFaq(not_null<Ui::VerticalLayout*> container, bool icon) {
 	AddButton(
 		container,
-		lng_settings_faq,
+		tr::lng_settings_faq(),
 		icon ? st::settingsSectionButton : st::settingsButton,
 		icon ? &st::settingsIconFaq : nullptr
 	)->addClickHandler(OpenFaq);
@@ -231,7 +231,7 @@ void SetupHelp(not_null<Ui::VerticalLayout*> container) {
 	if (AuthSession::Exists()) {
 		const auto button = AddButton(
 			container,
-			lng_settings_ask_question,
+			tr::lng_settings_ask_question(),
 			st::settingsSectionButton);
 		button->addClickHandler([=] {
 			const auto ready = crl::guard(button, [](const MTPUser &data) {
diff --git a/Telegram/SourceFiles/settings/settings_notifications.cpp b/Telegram/SourceFiles/settings/settings_notifications.cpp
index 2db069bb7..d47e9c85d 100644
--- a/Telegram/SourceFiles/settings/settings_notifications.cpp
+++ b/Telegram/SourceFiles/settings/settings_notifications.cpp
@@ -491,14 +491,14 @@ void SetupAdvancedNotifications(not_null<Ui::VerticalLayout*> container) {
 	AddSkip(container, st::settingsCheckboxesSkip);
 	AddDivider(container);
 	AddSkip(container, st::settingsCheckboxesSkip);
-	AddSubsectionTitle(container, lng_settings_notifications_position);
+	AddSubsectionTitle(container, tr::lng_settings_notifications_position());
 	AddSkip(container, st::settingsCheckboxesSkip);
 
 	const auto position = container->add(
 		object_ptr<NotificationsCount>(container));
 
 	AddSkip(container, st::settingsCheckboxesSkip);
-	AddSubsectionTitle(container, lng_settings_notifications_count);
+	AddSubsectionTitle(container, tr::lng_settings_notifications_count());
 
 	const auto count = container->add(
 		object_ptr<Ui::SettingsSlider>(container, st::settingsSlider),
@@ -515,7 +515,7 @@ void SetupAdvancedNotifications(not_null<Ui::VerticalLayout*> container) {
 }
 
 void SetupNotificationsContent(not_null<Ui::VerticalLayout*> container) {
-	AddSubsectionTitle(container, lng_settings_notify_title);
+	AddSubsectionTitle(container, tr::lng_settings_notify_title());
 
 	const auto checkbox = [&](LangKey label, bool checked) {
 		return object_ptr<Ui::Checkbox>(
@@ -552,7 +552,7 @@ void SetupNotificationsContent(not_null<Ui::VerticalLayout*> container) {
 	AddSkip(container, st::settingsCheckboxesSkip);
 	AddDivider(container);
 	AddSkip(container, st::settingsCheckboxesSkip);
-	AddSubsectionTitle(container, lng_settings_badge_title);
+	AddSubsectionTitle(container, tr::lng_settings_badge_title());
 
 	const auto muted = addCheckbox(
 		lng_settings_include_muted,
@@ -565,7 +565,7 @@ void SetupNotificationsContent(not_null<Ui::VerticalLayout*> container) {
 	AddSkip(container, st::settingsCheckboxesSkip);
 	AddDivider(container);
 	AddSkip(container, st::settingsCheckboxesSkip);
-	AddSubsectionTitle(container, lng_settings_events_title);
+	AddSubsectionTitle(container, tr::lng_settings_events_title());
 
 	const auto joined = addCheckbox(
 		lng_settings_events_joined,
@@ -615,7 +615,7 @@ void SetupNotificationsContent(not_null<Ui::VerticalLayout*> container) {
 		AddSkip(container, st::settingsCheckboxesSkip);
 		AddDivider(container);
 		AddSkip(container, st::settingsCheckboxesSkip);
-		AddSubsectionTitle(container, lng_settings_native_title);
+		AddSubsectionTitle(container, tr::lng_settings_native_title());
 		return addCheckbox(nativeKey, Global::NativeNotifications());
 	}();
 
diff --git a/Telegram/SourceFiles/settings/settings_privacy_controllers.cpp b/Telegram/SourceFiles/settings/settings_privacy_controllers.cpp
index 81a92a9b9..2e443491f 100644
--- a/Telegram/SourceFiles/settings/settings_privacy_controllers.cpp
+++ b/Telegram/SourceFiles/settings/settings_privacy_controllers.cpp
@@ -315,21 +315,21 @@ QString PhoneNumberPrivacyController::title() {
 	return lang(lng_edit_privacy_phone_number_title);
 }
 
-LangKey PhoneNumberPrivacyController::optionsTitleKey() {
-	return lng_edit_privacy_phone_number_header;
+rpl::producer<QString> PhoneNumberPrivacyController::optionsTitleKey() {
+	return tr::lng_edit_privacy_phone_number_header();
 }
 
 rpl::producer<QString> PhoneNumberPrivacyController::warning() {
-	return Lang::Viewer(lng_edit_privacy_phone_number_warning);
+	return tr::lng_edit_privacy_phone_number_warning();
 }
 
-LangKey PhoneNumberPrivacyController::exceptionButtonTextKey(
+rpl::producer<QString> PhoneNumberPrivacyController::exceptionButtonTextKey(
 		Exception exception) {
 	switch (exception) {
 	case Exception::Always:
-		return lng_edit_privacy_phone_number_always_empty;
+		return tr::lng_edit_privacy_phone_number_always_empty();
 	case Exception::Never:
-		return lng_edit_privacy_phone_number_never_empty;
+		return tr::lng_edit_privacy_phone_number_never_empty();
 	}
 	Unexpected("Invalid exception value.");
 }
@@ -343,7 +343,7 @@ QString PhoneNumberPrivacyController::exceptionBoxTitle(Exception exception) {
 }
 
 rpl::producer<QString> PhoneNumberPrivacyController::exceptionsDescription() {
-	return Lang::Viewer(lng_edit_privacy_phone_number_exceptions);
+	return tr::lng_edit_privacy_phone_number_exceptions();
 }
 
 ApiWrap::Privacy::Key LastSeenPrivacyController::key() {
@@ -358,21 +358,21 @@ QString LastSeenPrivacyController::title() {
 	return lang(lng_edit_privacy_lastseen_title);
 }
 
-LangKey LastSeenPrivacyController::optionsTitleKey() {
-	return lng_edit_privacy_lastseen_header;
+rpl::producer<QString> LastSeenPrivacyController::optionsTitleKey() {
+	return tr::lng_edit_privacy_lastseen_header();
 }
 
 rpl::producer<QString> LastSeenPrivacyController::warning() {
-	return Lang::Viewer(lng_edit_privacy_lastseen_warning);
+	return tr::lng_edit_privacy_lastseen_warning();
 }
 
-LangKey LastSeenPrivacyController::exceptionButtonTextKey(
+rpl::producer<QString> LastSeenPrivacyController::exceptionButtonTextKey(
 		Exception exception) {
 	switch (exception) {
 	case Exception::Always:
-		return lng_edit_privacy_lastseen_always_empty;
+		return tr::lng_edit_privacy_lastseen_always_empty();
 	case Exception::Never:
-		return lng_edit_privacy_lastseen_never_empty;
+		return tr::lng_edit_privacy_lastseen_never_empty();
 	}
 	Unexpected("Invalid exception value.");
 }
@@ -386,7 +386,7 @@ QString LastSeenPrivacyController::exceptionBoxTitle(Exception exception) {
 }
 
 rpl::producer<QString> LastSeenPrivacyController::exceptionsDescription() {
-	return Lang::Viewer(lng_edit_privacy_lastseen_exceptions);
+	return tr::lng_edit_privacy_lastseen_exceptions();
 }
 
 void LastSeenPrivacyController::confirmSave(bool someAreDisallowed, FnMut<void()> saveCallback) {
@@ -427,15 +427,15 @@ bool GroupsInvitePrivacyController::hasOption(Option option) {
 	return (option != Option::Nobody);
 }
 
-LangKey GroupsInvitePrivacyController::optionsTitleKey() {
-	return lng_edit_privacy_groups_header;
+rpl::producer<QString> GroupsInvitePrivacyController::optionsTitleKey() {
+	return tr::lng_edit_privacy_groups_header();
 }
 
-LangKey GroupsInvitePrivacyController::exceptionButtonTextKey(
+rpl::producer<QString> GroupsInvitePrivacyController::exceptionButtonTextKey(
 		Exception exception) {
 	switch (exception) {
-	case Exception::Always: return lng_edit_privacy_groups_always_empty;
-	case Exception::Never: return lng_edit_privacy_groups_never_empty;
+	case Exception::Always: return tr::lng_edit_privacy_groups_always_empty();
+	case Exception::Never: return tr::lng_edit_privacy_groups_never_empty();
 	}
 	Unexpected("Invalid exception value.");
 }
@@ -450,7 +450,7 @@ QString GroupsInvitePrivacyController::exceptionBoxTitle(Exception exception) {
 
 auto GroupsInvitePrivacyController::exceptionsDescription()
 -> rpl::producer<QString> {
-	return Lang::Viewer(lng_edit_privacy_groups_exceptions);
+	return tr::lng_edit_privacy_groups_exceptions();
 }
 
 ApiWrap::Privacy::Key CallsPrivacyController::key() {
@@ -465,15 +465,15 @@ QString CallsPrivacyController::title() {
 	return lang(lng_edit_privacy_calls_title);
 }
 
-LangKey CallsPrivacyController::optionsTitleKey() {
-	return lng_edit_privacy_calls_header;
+rpl::producer<QString> CallsPrivacyController::optionsTitleKey() {
+	return tr::lng_edit_privacy_calls_header();
 }
 
-LangKey CallsPrivacyController::exceptionButtonTextKey(
+rpl::producer<QString> CallsPrivacyController::exceptionButtonTextKey(
 		Exception exception) {
 	switch (exception) {
-	case Exception::Always: return lng_edit_privacy_calls_always_empty;
-	case Exception::Never: return lng_edit_privacy_calls_never_empty;
+	case Exception::Always: return tr::lng_edit_privacy_calls_always_empty();
+	case Exception::Never: return tr::lng_edit_privacy_calls_never_empty();
 	}
 	Unexpected("Invalid exception value.");
 }
@@ -487,7 +487,7 @@ QString CallsPrivacyController::exceptionBoxTitle(Exception exception) {
 }
 
 rpl::producer<QString> CallsPrivacyController::exceptionsDescription() {
-	return Lang::Viewer(lng_edit_privacy_calls_exceptions);
+	return tr::lng_edit_privacy_calls_exceptions();
 }
 
 object_ptr<Ui::RpWidget> CallsPrivacyController::setupBelowWidget(
@@ -497,10 +497,10 @@ object_ptr<Ui::RpWidget> CallsPrivacyController::setupBelowWidget(
 
 	AddDivider(content);
 	AddSkip(content);
-	AddSubsectionTitle(content, lng_settings_calls_peer_to_peer_title);
+	AddSubsectionTitle(content, tr::lng_settings_calls_peer_to_peer_title());
 	Settings::AddPrivacyButton(
 		content,
-		lng_settings_calls_peer_to_peer_button,
+		tr::lng_settings_calls_peer_to_peer_button(),
 		ApiWrap::Privacy::Key::CallsPeer2Peer,
 		[] { return std::make_unique<CallsPeer2PeerPrivacyController>(); });
 	AddSkip(content);
@@ -520,8 +520,8 @@ QString CallsPeer2PeerPrivacyController::title() {
 	return lang(lng_edit_privacy_calls_p2p_title);
 }
 
-LangKey CallsPeer2PeerPrivacyController::optionsTitleKey() {
-	return lng_edit_privacy_calls_p2p_header;
+rpl::producer<QString> CallsPeer2PeerPrivacyController::optionsTitleKey() {
+	return tr::lng_edit_privacy_calls_p2p_header();
 }
 
 LangKey CallsPeer2PeerPrivacyController::optionLabelKey(
@@ -535,14 +535,14 @@ LangKey CallsPeer2PeerPrivacyController::optionLabelKey(
 }
 
 rpl::producer<QString> CallsPeer2PeerPrivacyController::warning() {
-	return Lang::Viewer(lng_settings_peer_to_peer_about);
+	return tr::lng_settings_peer_to_peer_about();
 }
 
-LangKey CallsPeer2PeerPrivacyController::exceptionButtonTextKey(
+rpl::producer<QString> CallsPeer2PeerPrivacyController::exceptionButtonTextKey(
 		Exception exception) {
 	switch (exception) {
-	case Exception::Always: return lng_edit_privacy_calls_p2p_always_empty;
-	case Exception::Never: return lng_edit_privacy_calls_p2p_never_empty;
+	case Exception::Always: return tr::lng_edit_privacy_calls_p2p_always_empty();
+	case Exception::Never: return tr::lng_edit_privacy_calls_p2p_never_empty();
 	}
 	Unexpected("Invalid exception value.");
 }
@@ -556,7 +556,7 @@ QString CallsPeer2PeerPrivacyController::exceptionBoxTitle(Exception exception)
 }
 
 rpl::producer<QString> CallsPeer2PeerPrivacyController::exceptionsDescription() {
-	return Lang::Viewer(lng_edit_privacy_calls_p2p_exceptions);
+	return tr::lng_edit_privacy_calls_p2p_exceptions();
 }
 
 ApiWrap::Privacy::Key ForwardsPrivacyController::key() {
@@ -571,19 +571,19 @@ QString ForwardsPrivacyController::title() {
 	return lang(lng_edit_privacy_forwards_title);
 }
 
-LangKey ForwardsPrivacyController::optionsTitleKey() {
-	return lng_edit_privacy_forwards_header;
+rpl::producer<QString> ForwardsPrivacyController::optionsTitleKey() {
+	return tr::lng_edit_privacy_forwards_header();
 }
 
 rpl::producer<QString> ForwardsPrivacyController::warning() {
-	return Lang::Viewer(lng_edit_privacy_forwards_warning);
+	return tr::lng_edit_privacy_forwards_warning();
 }
 
-LangKey ForwardsPrivacyController::exceptionButtonTextKey(
+rpl::producer<QString> ForwardsPrivacyController::exceptionButtonTextKey(
 		Exception exception) {
 	switch (exception) {
-	case Exception::Always: return lng_edit_privacy_forwards_always_empty;
-	case Exception::Never: return lng_edit_privacy_forwards_never_empty;
+	case Exception::Always: return tr::lng_edit_privacy_forwards_always_empty();
+	case Exception::Never: return tr::lng_edit_privacy_forwards_never_empty();
 	}
 	Unexpected("Invalid exception value.");
 }
@@ -598,7 +598,7 @@ QString ForwardsPrivacyController::exceptionBoxTitle(Exception exception) {
 
 auto ForwardsPrivacyController::exceptionsDescription()
 -> rpl::producer<QString> {
-	return Lang::Viewer(lng_edit_privacy_forwards_exceptions);
+	return tr::lng_edit_privacy_forwards_exceptions();
 }
 
 object_ptr<Ui::RpWidget> ForwardsPrivacyController::setupAboveWidget(
@@ -767,15 +767,15 @@ bool ProfilePhotoPrivacyController::hasOption(Option option) {
 	return (option != Option::Nobody);
 }
 
-LangKey ProfilePhotoPrivacyController::optionsTitleKey() {
-	return lng_edit_privacy_profile_photo_header;
+rpl::producer<QString> ProfilePhotoPrivacyController::optionsTitleKey() {
+	return tr::lng_edit_privacy_profile_photo_header();
 }
 
-LangKey ProfilePhotoPrivacyController::exceptionButtonTextKey(
+rpl::producer<QString> ProfilePhotoPrivacyController::exceptionButtonTextKey(
 		Exception exception) {
 	switch (exception) {
-	case Exception::Always: return lng_edit_privacy_profile_photo_always_empty;
-	case Exception::Never: return lng_edit_privacy_profile_photo_never_empty;
+	case Exception::Always: return tr::lng_edit_privacy_profile_photo_always_empty();
+	case Exception::Never: return tr::lng_edit_privacy_profile_photo_never_empty();
 	}
 	Unexpected("Invalid exception value.");
 }
@@ -790,7 +790,7 @@ QString ProfilePhotoPrivacyController::exceptionBoxTitle(Exception exception) {
 
 auto ProfilePhotoPrivacyController::exceptionsDescription()
 -> rpl::producer<QString> {
-	return Lang::Viewer(lng_edit_privacy_profile_photo_exceptions);
+	return tr::lng_edit_privacy_profile_photo_exceptions();
 }
 
 } // namespace Settings
diff --git a/Telegram/SourceFiles/settings/settings_privacy_controllers.h b/Telegram/SourceFiles/settings/settings_privacy_controllers.h
index c43f5360a..8dfab6ed5 100644
--- a/Telegram/SourceFiles/settings/settings_privacy_controllers.h
+++ b/Telegram/SourceFiles/settings/settings_privacy_controllers.h
@@ -46,9 +46,10 @@ public:
 	MTPInputPrivacyKey apiKey() override;
 
 	QString title() override;
-	LangKey optionsTitleKey() override;
+	rpl::producer<QString> optionsTitleKey() override;
 	rpl::producer<QString> warning() override;
-	LangKey exceptionButtonTextKey(Exception exception) override;
+	rpl::producer<QString> exceptionButtonTextKey(
+		Exception exception) override;
 	QString exceptionBoxTitle(Exception exception) override;
 	rpl::producer<QString> exceptionsDescription() override;
 
@@ -63,13 +64,16 @@ public:
 	MTPInputPrivacyKey apiKey() override;
 
 	QString title() override;
-	LangKey optionsTitleKey() override;
+	rpl::producer<QString> optionsTitleKey() override;
 	rpl::producer<QString> warning() override;
-	LangKey exceptionButtonTextKey(Exception exception) override;
+	rpl::producer<QString> exceptionButtonTextKey(
+		Exception exception) override;
 	QString exceptionBoxTitle(Exception exception) override;
 	rpl::producer<QString> exceptionsDescription() override;
 
-	void confirmSave(bool someAreDisallowed, FnMut<void()> saveCallback) override;
+	void confirmSave(
+		bool someAreDisallowed,
+		FnMut<void()> saveCallback) override;
 
 };
 
@@ -83,8 +87,9 @@ public:
 
 	QString title() override;
 	bool hasOption(Option option) override;
-	LangKey optionsTitleKey() override;
-	LangKey exceptionButtonTextKey(Exception exception) override;
+	rpl::producer<QString> optionsTitleKey() override;
+	rpl::producer<QString> exceptionButtonTextKey(
+		Exception exception) override;
 	QString exceptionBoxTitle(Exception exception) override;
 	rpl::producer<QString> exceptionsDescription() override;
 
@@ -99,8 +104,9 @@ public:
 	MTPInputPrivacyKey apiKey() override;
 
 	QString title() override;
-	LangKey optionsTitleKey() override;
-	LangKey exceptionButtonTextKey(Exception exception) override;
+	rpl::producer<QString> optionsTitleKey() override;
+	rpl::producer<QString> exceptionButtonTextKey(
+		Exception exception) override;
 	QString exceptionBoxTitle(Exception exception) override;
 	rpl::producer<QString> exceptionsDescription() override;
 
@@ -118,10 +124,11 @@ public:
 	MTPInputPrivacyKey apiKey() override;
 
 	QString title() override;
-	LangKey optionsTitleKey() override;
+	rpl::producer<QString> optionsTitleKey() override;
 	LangKey optionLabelKey(EditPrivacyBox::Option option) override;
 	rpl::producer<QString> warning() override;
-	LangKey exceptionButtonTextKey(Exception exception) override;
+	rpl::producer<QString> exceptionButtonTextKey(
+		Exception exception) override;
 	QString exceptionBoxTitle(Exception exception) override;
 	rpl::producer<QString> exceptionsDescription() override;
 
@@ -138,9 +145,10 @@ public:
 	MTPInputPrivacyKey apiKey() override;
 
 	QString title() override;
-	LangKey optionsTitleKey() override;
+	rpl::producer<QString> optionsTitleKey() override;
 	rpl::producer<QString> warning() override;
-	LangKey exceptionButtonTextKey(Exception exception) override;
+	rpl::producer<QString> exceptionButtonTextKey(
+		Exception exception) override;
 	QString exceptionBoxTitle(Exception exception) override;
 	rpl::producer<QString> exceptionsDescription() override;
 
@@ -170,8 +178,9 @@ public:
 
 	QString title() override;
 	bool hasOption(Option option) override;
-	LangKey optionsTitleKey() override;
-	LangKey exceptionButtonTextKey(Exception exception) override;
+	rpl::producer<QString> optionsTitleKey() override;
+	rpl::producer<QString> exceptionButtonTextKey(
+		Exception exception) override;
 	QString exceptionBoxTitle(Exception exception) override;
 	rpl::producer<QString> exceptionsDescription() override;
 
diff --git a/Telegram/SourceFiles/settings/settings_privacy_security.cpp b/Telegram/SourceFiles/settings/settings_privacy_security.cpp
index 6da66dd11..48ff0f44b 100644
--- a/Telegram/SourceFiles/settings/settings_privacy_security.cpp
+++ b/Telegram/SourceFiles/settings/settings_privacy_security.cpp
@@ -106,7 +106,7 @@ rpl::producer<int> BlockedUsersCount() {
 
 void SetupPrivacy(not_null<Ui::VerticalLayout*> container) {
 	AddSkip(container, st::settingsPrivacySkip);
-	AddSubsectionTitle(container, lng_settings_privacy_title);
+	AddSubsectionTitle(container, tr::lng_settings_privacy_title());
 
 	auto count = BlockedUsersCount(
 	) | rpl::map([](int count) {
@@ -114,7 +114,7 @@ void SetupPrivacy(not_null<Ui::VerticalLayout*> container) {
 	});
 	AddButtonWithLabel(
 		container,
-		lng_settings_blocked_users,
+		tr::lng_settings_blocked_users(),
 		std::move(count),
 		st::settingsButton
 	)->addClickHandler([] {
@@ -132,38 +132,39 @@ void SetupPrivacy(not_null<Ui::VerticalLayout*> container) {
 	});
 
 	using Key = Privacy::Key;
-	const auto add = [&](LangKey label, Key key, auto controller) {
-		AddPrivacyButton(container, label, key, controller);
+	const auto add = [&](
+			rpl::producer<QString> label,
+			Key key,
+			auto controller) {
+		AddPrivacyButton(container, std::move(label), key, controller);
 	};
 	add(
-		lng_settings_phone_number_privacy,
+		tr::lng_settings_phone_number_privacy(),
 		Key::PhoneNumber,
 		[] { return std::make_unique<PhoneNumberPrivacyController>(); });
 	add(
-		lng_settings_last_seen,
+		tr::lng_settings_last_seen(),
 		Key::LastSeen,
 		[] { return std::make_unique<LastSeenPrivacyController>(); });
 	add(
-		lng_settings_forwards_privacy,
+		tr::lng_settings_forwards_privacy(),
 		Key::Forwards,
 		[] { return std::make_unique<ForwardsPrivacyController>(); });
 	add(
-		lng_settings_profile_photo_privacy,
+		tr::lng_settings_profile_photo_privacy(),
 		Key::ProfilePhoto,
 		[] { return std::make_unique<ProfilePhotoPrivacyController>(); });
 	add(
-		lng_settings_calls,
+		tr::lng_settings_calls(),
 		Key::Calls,
 		[] { return std::make_unique<CallsPrivacyController>(); });
 	add(
-		lng_settings_groups_invite,
+		tr::lng_settings_groups_invite(),
 		Key::Invites,
 		[] { return std::make_unique<GroupsInvitePrivacyController>(); });
 
 	AddSkip(container, st::settingsPrivacySecurityPadding);
-	AddDividerText(
-		container,
-		Lang::Viewer(lng_settings_group_privacy_about));
+	AddDividerText(container, tr::lng_settings_group_privacy_about());
 }
 
 not_null<Ui::SlideWrap<Ui::PlainShadow>*> AddSeparator(
@@ -177,15 +178,15 @@ not_null<Ui::SlideWrap<Ui::PlainShadow>*> AddSeparator(
 
 void SetupLocalPasscode(not_null<Ui::VerticalLayout*> container) {
 	AddSkip(container);
-	AddSubsectionTitle(container, lng_settings_passcode_title);
+	AddSubsectionTitle(container, tr::lng_settings_passcode_title());
 
 	auto has = PasscodeChanges(
 	) | rpl::map([] {
 		return Global::LocalPasscode();
 	});
 	auto text = rpl::combine(
-		Lang::Viewer(lng_passcode_change),
-		Lang::Viewer(lng_passcode_turn_on),
+		tr::lng_passcode_change(),
+		tr::lng_passcode_turn_on(),
 		base::duplicate(has),
 		[](const QString &change, const QString &create, bool has) {
 			return has ? change : create;
@@ -207,15 +208,15 @@ void SetupLocalPasscode(not_null<Ui::VerticalLayout*> container) {
 	inner->add(
 		object_ptr<Button>(
 			inner,
-			Lang::Viewer(lng_settings_passcode_disable),
+			tr::lng_settings_passcode_disable(),
 			st::settingsButton)
 	)->addClickHandler([] {
 		Ui::show(Box<PasscodeBox>(true));
 	});
 
 	const auto label = Platform::LastUserInputTimeSupported()
-		? lng_passcode_autolock_away
-		: lng_passcode_autolock_inactive;
+		? tr::lng_passcode_autolock_away
+		: tr::lng_passcode_autolock_inactive;
 	auto value = PasscodeChanges(
 	) | rpl::map([] {
 		const auto autolock = Global::AutoLock();
@@ -226,7 +227,7 @@ void SetupLocalPasscode(not_null<Ui::VerticalLayout*> container) {
 
 	AddButtonWithLabel(
 		inner,
-		label,
+		label(),
 		std::move(value),
 		st::settingsButton
 	)->addClickHandler([] {
@@ -244,7 +245,7 @@ void SetupCloudPassword(not_null<Ui::VerticalLayout*> container) {
 
 	AddDivider(container);
 	AddSkip(container);
-	AddSubsectionTitle(container, lng_settings_password_title);
+	AddSubsectionTitle(container, tr::lng_settings_password_title());
 
 	auto has = rpl::single(
 		false
@@ -300,8 +301,8 @@ void SetupCloudPassword(not_null<Ui::VerticalLayout*> container) {
 	}, label->lifetime());
 
 	auto text = rpl::combine(
-		Lang::Viewer(lng_cloud_password_set),
-		Lang::Viewer(lng_cloud_password_edit),
+		tr::lng_cloud_password_set(),
+		tr::lng_cloud_password_edit(),
 		base::duplicate(has)
 	) | rpl::map([](const QString &set, const QString &edit, bool has) {
 		return has ? edit : set;
@@ -331,7 +332,7 @@ void SetupCloudPassword(not_null<Ui::VerticalLayout*> container) {
 			container,
 			object_ptr<Button>(
 				container,
-				Lang::Viewer(lng_cloud_password_confirm),
+				tr::lng_cloud_password_confirm(),
 				st::settingsButton)));
 	confirm->toggleOn(rpl::single(
 		false
@@ -372,7 +373,7 @@ void SetupCloudPassword(not_null<Ui::VerticalLayout*> container) {
 			container,
 			object_ptr<Button>(
 				container,
-				Lang::Viewer(lng_settings_password_disable),
+				tr::lng_settings_password_disable(),
 				st::settingsButton)));
 	disable->toggleOn(rpl::combine(
 		rpl::duplicate(has),
@@ -385,7 +386,7 @@ void SetupCloudPassword(not_null<Ui::VerticalLayout*> container) {
 			container,
 			object_ptr<Button>(
 				container,
-				Lang::Viewer(lng_settings_password_abort),
+				tr::lng_settings_password_abort(),
 				st::settingsAttentionButton)));
 	abort->toggleOn(rpl::combine(
 		rpl::duplicate(has),
@@ -412,7 +413,7 @@ void SetupCloudPassword(not_null<Ui::VerticalLayout*> container) {
 void SetupSelfDestruction(not_null<Ui::VerticalLayout*> container) {
 	AddDivider(container);
 	AddSkip(container);
-	AddSubsectionTitle(container, lng_settings_destroy_title);
+	AddSubsectionTitle(container, tr::lng_settings_destroy_title());
 
 	Auth().api().reloadSelfDestruct();
 	const auto label = [] {
@@ -424,7 +425,7 @@ void SetupSelfDestruction(not_null<Ui::VerticalLayout*> container) {
 
 	AddButtonWithLabel(
 		container,
-		lng_settings_destroy_if,
+		tr::lng_settings_destroy_if(),
 		label(),
 		st::settingsButton
 	)->addClickHandler([] {
@@ -436,19 +437,17 @@ void SetupSelfDestruction(not_null<Ui::VerticalLayout*> container) {
 
 void SetupSessionsList(not_null<Ui::VerticalLayout*> container) {
 	AddSkip(container);
-	AddSubsectionTitle(container, lng_settings_sessions_title);
+	AddSubsectionTitle(container, tr::lng_settings_sessions_title());
 
 	AddButton(
 		container,
-		lng_settings_show_sessions,
+		tr::lng_settings_show_sessions(),
 		st::settingsButton
 	)->addClickHandler([] {
 		Ui::show(Box<SessionsBox>());
 	});
 	AddSkip(container, st::settingsPrivacySecurityPadding);
-	AddDividerText(
-		container,
-		Lang::Viewer(lng_settings_sessions_about));
+	AddDividerText(container, tr::lng_settings_sessions_about());
 }
 
 } // namespace
@@ -541,13 +540,13 @@ object_ptr<BoxContent> CloudPasswordAppOutdatedBox() {
 
 void AddPrivacyButton(
 		not_null<Ui::VerticalLayout*> container,
-		LangKey label,
+		rpl::producer<QString> label,
 		Privacy::Key key,
 		Fn<std::unique_ptr<EditPrivacyController>()> controller) {
 	const auto shower = Ui::CreateChild<rpl::lifetime>(container.get());
 	AddButtonWithLabel(
 		container,
-		label,
+		std::move(label),
 		PrivacyString(key),
 		st::settingsButton
 	)->addClickHandler([=] {
diff --git a/Telegram/SourceFiles/settings/settings_privacy_security.h b/Telegram/SourceFiles/settings/settings_privacy_security.h
index 724c14f53..8a5b83ec7 100644
--- a/Telegram/SourceFiles/settings/settings_privacy_security.h
+++ b/Telegram/SourceFiles/settings/settings_privacy_security.h
@@ -23,7 +23,7 @@ object_ptr<BoxContent> CloudPasswordAppOutdatedBox();
 
 void AddPrivacyButton(
 	not_null<Ui::VerticalLayout*> container,
-	LangKey label,
+	rpl::producer<QString> label,
 	ApiWrap::Privacy::Key key,
 	Fn<std::unique_ptr<EditPrivacyController>()> controller);
 
diff --git a/Telegram/SourceFiles/window/window_outdated_bar.cpp b/Telegram/SourceFiles/window/window_outdated_bar.cpp
index 97516b3bf..18397726b 100644
--- a/Telegram/SourceFiles/window/window_outdated_bar.cpp
+++ b/Telegram/SourceFiles/window/window_outdated_bar.cpp
@@ -46,7 +46,7 @@ Bar::Bar(not_null<QWidget*> parent, QDate date)
 : _date(date)
 , _title(
 	this,
-	Lang::Viewer(lng_outdated_title) | Ui::Text::ToUpper(),
+	tr::lng_outdated_title() | Ui::Text::ToUpper(),
 	st::windowOutdatedTitle)
 , _details(this,
 	QString(),